African Journal of Business Management Vol.3 (9), pp. 444-452, September, 2009
Available online at http://www.academicjournals.org/ajbm
ISSN 1993-8233 2009 Academic Journals
Ful Length Research Paper Attitudes of young consumers towards SMS advertising D. L. R Van der Waldt*, T. M. Rebello and W. J. Brown
Department of Marketing and Communication Management, University of Pretoria, Pretoria, South Africa.
Technological advancements have provided various new mediums for advertising to consumers and have further allowed organisations to better reach consumers with regards to the frequency and impact of advertising. Advertisers have to be more creative in the formulation of advertisements and selection of advertising mediums so as to gain the attention of their target market. The need to create new mediums for advertising has lead to the creation of new-age media such as inter alia, short message service (SMS) advertising. Before this medium can be effectively used to reach South African consumers, the attitude of consumers towards SMS advertisements need to be determined. This study therefore focuses on determining the perceptions of the younger consumer segment towards SMS advertisements. It is expected that this segment, due to their changing consumer behaviour and media habits, will be the future focus of a great deal of SMS advertising campaigns. Quota sampling was done in a large university and self-administered questionnaires were completed by 198 respondents. It was found that consumers’ perceptions of the entertainment value, informativeness and credibility of SMS advertisements are positively correlated to consumers’ overall attitudes towards SMS advertisements. The study further found consumers’ perceptions of the irritation aspect of SMS advertisements is negatively correlated with consumers’ attitudes towards SMS advertisements. Consumers have generally negative overall attitudes towards SMS advertisements and it must be cautiously used when attempting to gain the attention of a younger segment of consumers. Permission- based marketing, the sending of SMS advertisements to only those who have agreed to receive promotional information, is an important element for the success of SMS advertising. Key words: SMS, advertisement, consumer, organisation.
INTRODUCTION
Organisations today operate in an environment that is
mediums for advertising to consumers and have further
characterised by constant change and an increase in
al owed for organisations to better reach consumers with
competition as a result of globalisation. Zyman and Brott
regards to the frequency and impact of advertising (Du
(2002:31) suggest that the biggest change in the market
Plessis, Bothma, Jordaan and Van Heerden, 2003: 339).
place is that consumers have a greater selection with
These advances in technology, combined with the market
regards to products and services and those organisations
place’s need to increase advertising to consumers, has
should become more conscious of their advertising
led to the fact that “Advertising is everywhere” (Cook,
efforts. Organisations now view advertising as an invest-
2001:1). The constant exposure to advertising might
ment and tend to value over-communication with con-
cause consumers to become immune to advertising.
umers, resulting in greater budgets for advertising
Advertisers have to be more creative in the formulation of
departments than in the past ( Zyman and Brott, 2002:22-
advertisements and selection of advertising mediums so
as to gain the attention of their target market (Cappo,
Technological advancements have provided various new
This need to create new mediums for advertising has
lead to the creation of new-age media such as: the
internet, which includes electronic-mail (e-mail) and
*Corresponding author. Email: Delarey.vanderwaldt@up.ac.za.
websites; wireless application protocol (WAP); voice-over
Tel: (012) 420-3415. Fax: (012) 362-5085.
internet protocol (VoIP) and cel ular technology and short
message service (SMS). WAP is a wireless system that
al ows users to access the internet using their cel
The general consensus among academics and
phones. VoIP involves the sending of voice messages
practitioners is that SMS advertising is an ideal medium
over the internet (Du Plessis et al., 2003: 344-354).
for reaching young consumers (Scharl, Dickinger and
In 2005, approximately 14 mil ion South African adults
Murphy, 2005: bn168). This study is therefore a partial
(46% of the total population) owned a cel phone (AMPS,
replication of the study conducted by Tsang, Ho and Ling
2005) which created the opportunity for a new medium of
(2004: b65-78) but in a South African context. The focus
advertising. Mobile communications and its most
is on the attitudes of a younger segment of consumers
successful application, short message service (SMS),
(students at a large University in the Gauteng province)
now al ows for the direct and two-way communication
towards SMS advertisements. The main objective of the
between an organisation and consumers (Dickinger,
research is to determine whether there is a correlation
Haghirian, Murphy and Scharl, 2004: 1; Haghirian,
between consumer perceptions of the value of entertain-
Madlberger and Tanuskova, 2005: 7). According to
ment, informativeness, irritation and credibility of SMS
advertisements and consumers’ overal attitude towards
www.engr.sjsu.edu.innopac.up.ac.za:80/gaojerry/course/
296A/wireless-add-paper2.pdf (Downloaded: 2006-04-
07)] “Short messaging service (SMS) is a digital cel ular
network feature and it al ows users to send short text and
Literature background
numeric messages to and from digital cel phones using
cel phones and e-mail addresses based on public SMS
SMS advertising
messaging gateways over the internet.”
When defining SMS advertising, it is first necessary to
Based upon the benefits and proliferation of cel
analyse the definition of mobile marketing as this defini-
phones, one can expect an increase in the volume of
tion may in part apply to the definition of SMS advertising.
SMS-type advertisements and its importance in the
Dickinger et al. (2004:2) define mobile marketing as
communication mix of an organisation. SMS advertising
“Using interactive wireless media to provide customers
can be classified as traditional advertising, direct
with time and location sensitive, personalized information
marketing or an interactive medium al owing for two-way
that promotes goods, services and ideas, thereby gene-
communication between an organisation and customer/s
rating value for al stakeholders.” Mobile marketing is
(Du Plessis et al., 2003:350-351). Organisations are
based upon sending information to consumers using
starting to use this medium as a method of sales promo-
either SMS or MMS (Multimedia Message Service)
tion and send coupons to consumers’ cel phones via
(Kavassalis, Spyropoulou, Drossos, Mitrokostas, Gikas
SMS. This has proven to be an effective form of sales
and Hatzistamatiou, 2003: 56). It can therefore be
promotion as consumers have their cel phones on them
assumed that mobile marketing involves some degree of
at al times and have the coupon available when needed
SMS advertising with the latter being a component of
(Cravens and Piercy, 2003: 401-402; Dickinger et al.,
mobile marketing. For the purpose of this study, SMS
2004: 4; Du Plessis et al., 2003: 351). In this research
advertising wil be defined as “Using short message
SMS advertising wil be investigated as a component of
service (SMS), sent to consumers’ cel phones, to provide
the advertising and direct marketing elements.
consumers with time and location sensitive information
that promotes goods, services and ideas, thereby gene-
Problem statement
rating value for al stakeholders” (Kavassalis et al., 2003:
Little research has been conducted with regard to
Studies have highlighted a vast number of advantages
consumers’ perceptions of SMS advertising and also the
of SMS advertising and includes that this medium al ows
impact of sending advertisements to consumers’ via SMS
for real-time communication with consumers anytime and
(Haghirian et al., 2005: 7). This is particularly important in
anywhere (Tsang et al., 2004: 68). SMS advertising also
the South African context where the success of a new
increases the probability that the advertisement reaches
medium such as SMS advertising relies on the accep-
the target market as consumers general y have only one
tance of the medium by consumers (Bauer, Reichardt,
cel phone which is very personal in nature and carried
Barnes and Neumann, 2005:182). Before this medium
around with them at al times (Kavassalis et al., 2003:
can be effectively used to communicate with South
African consumers, research needs to be conducted with
SMS advertising is the only channel relevant for
regards to their attitudes towards SMS advertising. The
recipients when on the move and is a great benefit for
majority of research conducted with regard to consumer
targeting young consumers who often have active
attitudes towards mobile or SMS advertising has been
lifestyles and are not exposed to the more traditional
conducted in foreign countries where the findings, due to
advertising channels (Heinonen and Strandvik, 2002:
cultural differences and differences in the adoption of
142.) The younger generation of consumers have also
technology, may not directly apply to South African con-
been quicker than older generations in learning to use
and adapt to new technologies such as the internet and
identified in the model developed by Ducoffe (1996: 29)
cel phones (Spero and Stone, 2004: 156).
but it contains two additional constructs namely credi-
Another benefit of SMS advertising is that, if effectively
bility, which is an antecedent of consumer attitudes
planned, an SMS advertising campaign is low in cost.
towards an advertisement (Mackenzie and Lutz, 1989:
The low cost of SMS advertising is amplified by the ability
50), and relevant demographic variables which can have
of this medium to target and provide specific customers
an impact on consumer attitudes towards internet adver-
with relevant information and obtain a high response rate
tising (Brackett and Carr, 2001: 24, 31).
among recipients of the message and reduce wastage
The framework depicted in Figure 1 has in the past
been used to test consumer attitudes towards SMS ad-
Although SMS advertising has a great advantage over
vertising (Tsang et al., 2004: 65-75) and the constructs
more traditional mediums of advertising, it is often
entertainment, informativeness, irritation and credibility
stressed that the medium should not be used in isolation.
wil be used in this study to test hypotheses. Demo-
SMS advertising should be complimentary with the
graphic variables such as gender, income and occupation
traditional mediums of advertising (Kavassalis et al.,
2003: 56; Scharl et al., 2005: 168). The complimentary
nature of SMS advertising may be based upon the fact
that mobile marketing and SMS advertising are stil in the
Hypotheses
early stages of commercial deployment. Consumers may
Entertainment
not as yet be ful y adapted to cel phone technology and
the receiving of SMS advertisements (Bauer et al., 2005:
McQuail (in Ducoffe, 1996:23) defines entertainment as
“…the ability to fulfil an audience’s needs for escapism,
diversion, aesthetic enjoyment, or emotional enjoyment.”
The model of consumer attitudes towards SMS advertise-
Consumer attitudes
ments as developed by Brackett and Carr (2001: 25) in
This study focuses on determining consumer attitudes
Figure 1, theoretical y depicts the relationship between
towards SMS advertisements and it is surmised that the
consumer perceptions of the entertainment value of inter-
attitudes towards SMS advertisements wil affect both the
net advertising and consumer attitudes towards internet
success of SMS advertising campaigns and the purchase
advertising. This model has in various studies been used
intentions of consumers who receive SMS advertise-
as the basis for hypothetical testing of the relationship in
ments. It was il ustrated by Andersson and Nilsson (2000:
the SMS advertising or mobile marketing context (Bauer
18) that SMS advertisements and the SMS advertising
et al., 2005: 181-192; Haghirian et al., 2005:1-10; Tsang
medium, in general, wil affect the attainment of the
et al., 2004:65-78). Based upon the model, the fol owing
advertising campaign objectives. Consumer attitudes
consist of three components that is cognition, affect and
conation according to Du Plessis and Rousseau (2007:
1: Consumers’ perceptions of the value of entertainment
of SMS advertisements are positively correlated to
194-197). For the purposes of this study the first
consumers’ overal attitudes towards SMS advertising.
According to Fishbein’s Attitude Theory (in Andersson
The above hypothesis can be further supported by the
and Nilsson, 2000: 18), a stimulus, such as an SMS
uses-and-gratification model (Katz, Gurevitch and Haas,
advertisement of a particular brand, has an affect on a
1973: 166) which states that individuals have needs with
consumer’s belief system which in turn influences and
regards to the mass media and these needs are
leads to the consumer developing a specific attitude
classified into five groups. Of reference to this hypothesis
towards the advertised brand. The attitude which a con-
is individuals’ “needs related to strengthening aesthetic,
sumer has with regards to a brand has an impact on a
pleasurable and emotional experience – or affective
consumer’s intention to purchase the brand offering.
needs” (Katz et al., 1973: 166.) One can assume that
The framework for the study of consumer attitudes
advertising that satisfies consumers’ need for aesthetics,
towards SMS advertising relies on the models developed
pleasure and an emotional experience wil be positively
for the study of consumer attitudes towards internet or
evaluated and accepted by consumers (Bauer et al.,
web advertising and advertising in general (Brackett and
2005: 185). In the study conducted by Bauer et al. (2005:
Carr, 2001: 25; Mackenzie and Lutz, 1989: 50). Ducoffe
181-192), the relationship between consumers’ perceived
(1996: 29) developed a model depicting the perceptual
entertainment utility of mobile marketing and consumer
antecedents of entertainment, informativeness and irrita-
attitudes towards mobile marketing was tested. The study
tion, used to determine consumers’ attitudes towards
found that consumers’ perceived entertainment utility of
internet advertising and formed the basis for the model
mobile marketing has a positive influence on consumers’
developed by Brackett and Carr (2001: 24-25) to test
perceptions of the overal utility of mobile marketing, which
consumer attitudes towards web advertising. The model,
in turn has a positive influence on consumer attitudes
as il ustrated in Figure 1, has the same three constructs
towards mobile marketing (Bauer et al., 2005:188).
Figure 1. Model for testing consumer attitudes towards SMS advertisements.
Source: Adapted from Brackett and Carr (2001:25).
Informativeness
(2005: 181-192) supports this assumption and highlights
that there is a positive relationship between consumers’
In the context of this study, informativeness can be
perceptions of the information utility of mobile marketing
defined as “…the ability of advertising to inform consu-
and consumers’ perceptions of the overal utility of mobile
mers of product alternatives so that purchases yielding
marketing. The study further identified the positive asso-
the greatest possible satisfaction can be made” (Ducoffe,
ciation between consumers’ perceptions of the overal
utility of mobile marketing and consumers’ attitudes
The model of consumers’ attitudes towards SMS
towards mobile marketing (Bauer et al., 2005:188).
advertisements (Figure 1) il ustrates that there is a rela-
tionship between consumers’ perceptions of the informa-
tiveness of internet advertising and consumers’ attitudes
Irritation
towards internet advertising (Brackett and Carr, 2001:
25). The model has been used in studies to il ustrate that
Ducoffe (1996:23), in the context of advertising, defines
there is a positive correlation between consumers’ per-
irritation as: “When advertising employs tactics that
ceptions of the informativeness of SMS advertisements
annoy, offend, insult, or are overly manipulative”. The
and consumers’ attitudes towards SMS advertisements
relationship between consumers’ perceptions of the
(Tsang et al., 2004: 71; Haghirian et al., 2005: 4; Brackett
irritation of an advertisement and consumers’ attitudes
towards an advertisement is theoretical y supported by
Based upon the relationship between informativeness
the attitude model developed by Bracket and Carr (2001:
of a SMS advertisement and consumers’ attitudes to-
5). Tsang et al. (2004: 71) tested the relationship be-
wards the SMS advertisement, the fol owing hypothesis
tween these two constructs and found that consumer per-
ceptions of the irritation of SMS advertisements is
negatively correlated to consumer attitudes towards SMS
advertisements. The fol owing hypothesis can therefore
2: Consumers’ perceptions of the informativeness of
SMS advertisements are positively correlated to con-
sumers’ overal attitudes towards SMS advertisements.
H3: Consumers’ perceptions of the irritation of SMS
The stated hypothesis can be further supported by the
advertisements are positively correlated to consumers’
uses-and-gratification model. The model suggests that
overal attitudes towards SMS advertisements.
individuals have “Needs related to strengthening infor-
mation, knowledge, and understanding – these can be
Credibility
cal ed cognitive needs” (Katz et al., 1973:166). If an
advertisement satisfies a consumer’s need for infor-
Advertisement credibility has been defined by Mackenzie
mation and knowledge about a service or product, it can
and Lutz (1989:51) as “the extent to which the consumer
be assumed that the advertisement wil be favourably
perceives claims made about the brand in the ad (adver-
perceived by the consumer. The study by Bauer et al.
tisement) to be truthful and believable. ” The model of
consumers’ attitudes towards SMS advertisements
Table 1. Cronbach’s alpha values for the
(Figure 1) further supports the relationship between
consumer perceptions of the credibility of the advertise-
ment and consumer attitudes towards the advertisement
Construct Cronbach’s alpha
(Bracket and Carr, 2001: 25). Research conducted by
various researchers has identified that there is a positive
correlation between consumer perceptions of the credi-
bility of an advertisement and consumer attitudes towards
the advertisement (Brackett and Carr, 2001:29; Tsang et
al., 2004: 71). The fol owing hypothesis can therefore be
H4: Consumers’ perceptions of the credibility of SMS
advertisements are positively correlated to consumers’
Reliability
overal attitudes towards SMS advertisements.
The Cronbach’s alpha values for the constructs are
The stated hypothesis can be further supported by the
uses-and-gratification model (Katz et al., 1973:166). The
As can be seen in Table 1 al the Cronbach’s Alpha va-
model states that individuals have “Needs related to
lues are higher than the acceptable level of internal
strengthening credibility, confidence, stability, and status
– these combine both cognitive and affective elements.”
In Table 2 the number of SMS messages sent and
Based upon these needs, it can be assumed that
received by the respondents is il ustrated (per day).
advertising and advertisements that satisfy consumers’
The findings in Table 2 suggest that the respondents
need for credibility, wil be positively perceived and
are involved to a great extent with the SMS communi-
cation function of their cel phones and are experienced
with the usage of cel phones and, more specifical y, the
SMS function. The findings imply that respondents,
through their high level of involvement with their cel
phones, depend on cel phones as a means of commu-
nicating with friends, family and possibly advertisers.
The target population for the study consisted of ful -time registered
undergraduate students at a large university in Gauteng. As the
study made use of quota sampling, the above mentioned target
HYPOTHESES TESTS
population was subdivided into an equal proportion of male and
female students. The realised sample was 200 students who own a
The assumption of normality was assessed through the
cel phone and have in the past received an SMS advertisement
Kolmogorov-Smirnov test. Tests for normality were also
from an organisation advertising a product or service.
assessed through a visual examination of histograms and
The use of a student sample is often criticised by researchers
who believe that such a sample is not representative of the greater
normal probability plots. It showed that the data deviate
market of general consumers (Wel s and Mithun, 2003: 45). The
to a great extent from a normal distribution.
use of a student sample for this study is justified as experts agree
The first hypothesis (H1) investigated whether or not
that SMS advertising is an ideal medium for reaching younger
there is a positive correlation between consumers’ perce-
ptions of the entertainment value of SMS advertisements
With the use of quota sampling, the researcher selected
respondents outside of the lecture hal s provided they met the
and consumers’ overal attitudes towards SMS
quota criteria and requirements as stated for the target population
of the study (Cooper and Schindler, 2003: 200-201).
Hypothesis 1 was tested using the non-parametric test,
Spearman’s Rank Order correlation at a 95 percent level
of confidence. Table 3 indicates the result of the
Measuring instrument
The resulting p-value (p < 0.001) is less than 0.05 and
A pre-tested self-administered questionnaire was used. The
therefore the hypothesis can be accepted. There is
entertainment, informativeness and irritation scales used in the
study were adapted from ducoffe’s (1996: 28) study of consumer
therefore a positive correlation between consumers’
attitudes towards advertising on the world wide web. The credibility
scale was adapted from the scale developed by brackett and carr
(2001: 25) in the study of consumer attitudes towards web adver
Hypotheses tests
tising. For the purpose of this study the wording of scale items was
slightly adapted to be more in line with consumer attitudes towards
sms advertising. A five-point likert-type scale, label ed from (1-
The assumption of normality was assessed through the
strongly disagree) to (5-strongly agree) was used and no items
Kolmogorov-Smirnov test. Tests for normality were also
assessed through a visual examination of histograms and
Table 2. Number of SMS messages sent and received by Number of SMS messages Sent (%) Received (%) Between 1 and 5 Table 3. Results of spearman’s rank order correlation – hypothesis 1. Entertainment value Table 4. Results of spearman’s rank order correlation – hypothesis 2. Informativeness Spearman's rho Overall Attitude Correlation Coefficient normal probability plots. It showed that the data deviate
ceptions of the entertainment value of SMS advertise-
to a great extent from a normal distribution.
ments and consumers’ attitudes towards SMS advertise-
The first hypothesis (H1) investigated whether or not
ments. This is supportive of the findings of Green,
there is a positive correlation between consumers’
Salking and Akey (1999:238). This implies that manage-
perceptions of the entertainment value of SMS advertise-
ment need to consider the entertainment aspect of SMS
ments and consumers’ overal attitudes towards SMS
The coefficient of determination (r2= 0.4502) implies
Hypothesis 1 was tested using the non-parametric test,
that 45% of the variance in consumers’ attitudes towards
Spearman’s Rank Order correlation at a 95 percent level
SMS advertisements can be explained by the variation in
of confidence. Table 3 indicates the result of the
consumers’ perceptions of the entertainment value of
SMS advertisements (Diamantopoulos and Schlegelmich,
The resulting p-value (p < 0.001) is less than 0.05 and
normal probability plots. It showed that the data deviate
The second hypothesis (H2) investigates the correlation
to a great extent from a normal distribution.
between consumers’ perceptions of the informativeness
The first hypothesis (H1) investigated whether or not
of SMS advertisements and consumers’ overal attitudes
there is a positive correlation between consumers’
towards SMS advertisements. Table 4 depicts the results
perceptions of the entertainment value of SMS advertise-
of the Spearman’s Rank Order Correlation which was
ments and consumers’ overal attitudes towards SMS
The p-value (p<0.001) calculated in the test is
Hypothesis 1 was tested using the non-parametric test,
significant at the 0.05 level and therefore the hypothesis
Spearman’s Rank Order correlation at a 95 percent level
can be accepted. Management needs to realise the
of confidence. Table 3 indicates the result of the
effect which the information content of a SMS advertise-
ment has on the attitudes of consumers and design
The resulting p-value (p<0.001) is less than 0.05 and
advertisements that provide consumers with relevant and
therefore the hypothesis can be accepted. There is
therefore a positive correlation between consumers’
The Coefficient of determination (r2= 0.3058) implies
therefore the hypothesis can be accepted. There is
that 30 percent of the variance in consumers’ attitudes
therefore a positive correlation between consumers’s per-
towards SMS advertisements can be explained by the
Table 5. Results of spearman’s rank order correlation – hypothesis 3. Irritation Table 6. Results of spearman’s rank order correlation – hypothesis 4. Credibility
variation in consumers’ perceptions of the informa-
Brackett and Carr (2001:24-25) be applied to consumer
attitudes towards SMS advertisements in a South African
Hypothesis 3 is concerned with testing whether or not
context. The findings indicate that young South African
there is a positive correlation between consumers’
consumers’ are highly engaged in the use of cel phones
perceptions of the irritation of SMS advertisements and
and the SMS functions, as a means of communicating
consumers’ overal attitudes towards SMS advertise-
ments. Spearman’s Rank Order Correlation was used to
test the hypothesis and the results are displayed in Table
Managerial implications
The p-value (p<0.001) is significant at the 0,05 level
and the alternative hypothesis can be accepted. The
coefficient of determination (r2= 0.2992) implies that
Based upon the consumers’ negative attitudes towards
nearly 30% of the variance in consumers’ attitudes
SMS advertisements, marketers need to recognise that
towards SMS advertisements can be explained by the
SMS advertisements, although offering many benefits in
variation in consumers’ perceptions of the irritation of
terms of reaching the youth, may not be as effective in
creating favourable attitudes towards the advertised
Hypothesis 4 is concerned with testing whether or not
product or service. Consumers with negative attitudes
there is a positive correlation between consumers’
towards SMS advertisements may choose to ignore, and
perceptions of the credibility of SMS advertisements and
not pursue the information of the SMS advertisement.
consumers’ overal attitudes towards SMS advertise-
Marketers wil find it difficult to create awareness of a
ments. Table 6 shows the results of the Spearman’s
product or service when using SMS advertisements to
Rank Order Correlation which was used to test the
consumers with negative attitudes towards the medium.
With regard to the fairly negative perceptions of the
The p-value (p<0.001) calculated for the test is
entertainment value of SMS advertisements, marketers
significant at a 95% level of confidence (p<0.05). The
need to look at ways of increasing the entertainment as
hypothesis can therefore be accepted. The coefficient of
wel as the level of enjoyment consumers associate with
determination (r2 = 0.2034) implies that, although there is
the receiving of SMS advertisements. In order to over-
a positive correlation between consumers’ perception of the
come the screen size and entertainment limitations of
credibility of SMS advertisements and consumers’ overal
SMS messages, marketers need to perhaps make use of
attitudes towards SMS advertisements, the strength
the MMS (multimedia message services), which takes
between the two constructs is very weak .
SMS messages to the next level and al ows for the
The results of the hypotheses tests indicated that
inclusion of visual elements, such as pictures and videos,
consumers’ perceptions of the entertainment value, infor-
as wel as sound. The use of MMS can help marketers
mativeness and credibility of SMS advertisements are
create more unique and entertaining advertisements that
positively correlated with the consumer attitudes towards
can be sent to consumers’ cel phones (Dickinger et al.,
SMS advertisements. This is consistent with the findings
2004: 7; Okazaki, 2006: 161). Marketers should also look
of Tsang et al. (2004: 71) in their study of consumer
at creating humorous SMS advertisements as these can
attitudes towards SMS advertisements. A major finding is
help to gain the attention of readers (Barwise and Strong,
that consumers have fairly negative attitudes towards SMS
2002: 22). This would however require greater and more
accurate capturing of consumer information so as to
It is suggested that the framework developed by
determine the consumers who have MMS enabled cel
Recommendations for future research
The relationship between consumers’ perceptions of
the irritation of SMS advertisements and consumer
Future researchers could use a bigger sample of
attitudes towards SMS advertisements, suggests that
respondents and where possible make use of random
marketers need to ensure that messages are sent to
sampling when selecting respondents to participate in the
consumers at a reasonable time during the day. A
study. Future research should also attempt to determine
recommendation is that marketers only send SMS
how consumers of different ages, class or culture
advertisements to recipients between 09:00 and 19:30 on
(relevant demographic variables) differ in their attitudes
weekdays and when sending SMS advertisements to
towards SMS advertisements. South Africa is a diverse
students, avoid sending the advertisement before noon
country in terms of different cultures and a study that
as students may be in class or sleeping (Dickinger et al.,
highlights differences in consumer attitudes towards SMS
advertisements based on cultural differences could be
Respondents’ perceptions of the credibility of SMS
valuable. Future researchers should also develop a new
advertisements proved to be relatively negative which wil
scale to measure overal attitudes towards SMS
have an adverse effect on consumers’ attitudes towards
advertisements, which incorporates more items.
SMS advertisements. This factor highlights the
importance of permission-based marketing in protecting
the credibility of the SMS advertising channel. Tsang et
Conclusion
al. (2004:68) state that “Permission-based advertising
differs from traditional irritating advertising in that
Marketers need to understand the target audience for
messages about specific products, services, or content
SMS advertising campaign and send messages to
are sent only to individuals who have explicitly indicated
consumers whereby the language and content of the
their wil ingness to receive the message.” Permission-
SMS advertisement is in unison with the target
based marketing ensures that advertisements are sent to
only those consumers that are interested in receiving
Although consumers have neutral perceptions of the
information from the organisation and avoids targeting
informativeness of SMS advertisements, consumers
those consumers that wil perceive the advertisement as
disagreed that SMS advertisements supplied relevant
being intrusive or irritating. It is essential, for the success
information. Marketers need to further ensure that they
of an SMS advertising campaign, to first gain the
send only relevant information to targeted consumers.
permission of consumers before sending SMS
Consumers value SMS advertisements that are short,
advertisements to random consumers (Andersson and
straight to the point and concern information that is
Nilsson, 2000: 47; Kavassalis et al., 2003: 64; Nysveen,
relevant to their interests. Marketers can also create
Pedersen and Thorbjørnsen, 2003: 21). Leppäniemi and
cryptic messages that stimulate the curiosity of those who
Karjaluoto (2005: 209) add that SMS advertising “…is
receive the SMS advertisement (Barwise and Strong,
considered more acceptable when delivered by a trusted
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Low dose naltrexone therapy in multiple sclerosis Y.P. Agrawal Department of Pathology, The University of Iowa, Iowa City, USA (YP Agrawal, MD PhD) Correspondence to: Yash Pal Agrawal, MD PhD, Department of Pathology, University of Iowa Roy J. and Lucille A. Carver College of Medicine, Iowa City 52242, USA. (e-m, FAX: 319-339-7148) Abstract The use of low doses of naltrexone
Intrahepatic Cholestasis of Pregnancy: a RandomizedControlled Trial Comparing Dexamethasone andAnna Glantz,1 Hanns-Ulrich Marschall,2 Frank Lammert,3 Lars-Åke Mattsson1 Intrahepatic cholestasis of pregnancy (ICP) is characterized by troublesome maternal pru- ritus, elevated serum bile acids ( > 10 mol/L) and increased fetal risk. Recently we deter- mined a cutoff level of serum bile ac