Research thus far has devoted little attention to the determinants of impulse purchase behavior The study employs the Heuristic-Sytematic Model (HSM) of Information Processing to examine the effects of need for uniqueness, spending habit, and perceived affordability on consumers’ impulse purchase behavior. Following the Social Impact Theory, the moderating effects of social contextual factors, including consumers flock and peer influence, are explored as well.
Research results based on a sample collected from 319 respondents show that individual need for uniqueness produces a positive effect on impulse purchase while individuals who have high control over spending exerts a negative effect. Although the moderating effects of peer influence and consumers flock are not supported, they do show positively direct effects. Moreover, perceived affordability is shown to be insignificantly related with impulse purchase behavior.
The research contributes to the consumer behavior literature by an examination of the antecedents of consumers’ impulse purchase behavior with the considerations of social contexts. Moreover, implications and future research directions are discussed further.

Argo, J. J., Dahl, D. W., & Manchanda, R. V. (2005a). The influence of a mere social presence in a retail context. Journal of Consumer Research, 32(2), 207-212.
Argo, J. J., Dahl, D. W., & Manchanda, R. V. (2005b). A non-interactive social presence in a retail setting: An investigation of its impact on consumers' emotions, congintive performance, and self representation behaviors. In G. Menon & A. R. Rao (Eds.), Advances consumer research (Vol. 32, pp. 309-310). Duluth, MN: Association for Consumer Research.
Banerjee, A. V. (1992). A simple model of herd behavior. The Quaterly Journal of Economics, 107(3), 797-817.
Baumeister, R. F. (2002). Yielding to temptation: Self-control failure, impulsive purchasing, and consumer behavior. Journal of Consumer Research, 28(4), 670-676.
Bayley, G., & Nancarrow, C. (1998). Impulse purchasing: A qualitative exploration of the phenomenon. Qualitative Market Research: An International Journal, 1(2), 99-114.
Bearden, W. O., Netemeyer, R. G., & Teel, J. E. (1989). Measurement of consumer susceptibility to interpersonal influence. Journal of Consumer Research, 15(4), 473-481.
Beatty, S. E., & Ferrell, M. E. (1998). Impulse buying: Modeling its precursors. Journal of Retailing, 74(2), 169-191.
Belk, R. W. (1988). Possessions and the extended self. Journal of Consumer Research, 15(2), 139-168.
Burroughs, J. E. (1996). Product symbolism, self meaning, and holistic matching: The role of information processing in impulsive buying. In K. P. Corfman & J. G. Lynch Jr. (Eds.), Advances in consumer research (Vol. 23, pp. 463-469). Provo, UT: Association for Consumer Research.
Chaiken, S., Liberman, A., & Eagly, A. H. (1989). Heuristic and systematic information processing within and beyond the persuasion context. In J. S. Uleman & J. A. Bargh (Eds.), Unintended thought. New York: The Guilford Press.
Childers, T. L., & Rao, A. R. (1992). The Influence of familial and peer-based reference groups on consumer decisions. Journal of Consumer Research, 19(2), 198-211.
Cobb, C. J., & Hoyer, W. D. (1986). Planned versus impulse purchase behavior. Journal of Retailing, 62(4), 384-409.
Coley, A., & Burgess, B. (2003). Gender differences in cognitive and affective impulse buying. Journal of Fashion Marketing and Management, 7(3), 282-295.
Conway, J., M., & Lance, C. E. (2010). What reviewers should expect from authors regarding common method bias in organizational research. Journal of Business Pyschology, 25, 325-334.
DeVellis, R. F. (2003). Scale development: Theory and applications (2nd ed.). Newbury Park, CA: SAGE.
Diamantopoulos, A., & Siguaw, J. A. (2000). Introducing LISREL: A guide for the uninitiated. London: SAGE Publication.
Dittmar, H., Beattie, J., & Friese, S. (1995). Gender identity and material symbols: Objects and decision considerations in impulse purchases. Journal of Economic Psychology, 16(3), 491-511.
Dittmar, H., Beattie, J., & Friese, S. (1996). Objects, decision considerations and self-image in men's and women's impulse purchases. Acta Psychologica, 93(1–3), 187-206.
Evans, J. S. B. T. (2008). Dual-processing accounts of reasoning, judgment, and social cognition. Annual Review of Psychology, 59, 255-278.
Gardner, M. P., & Rook, D. W. (1988). Effects of impulse purchases on consumers' affective states. In M. J. Houston (Ed.), Advances in consumer research (Vol. 15, pp. 127-130). Provo, UT: Association for Consumer Research.
Gigerenzer, G., Todd, P. M., & the ABC Research Group. (1999). Simple heuristics that make us smart. New York: Oxford University Press.
Goldberg, L. R. (1999). A broad-bandwidth, public domain, personality inventory measuring the lower-level facets of several five-factor models. In I. Mervielde, I. Deary, F. De Fruyt & F. Ostendorf (Eds.), Personality psychology in Europe (Vol. 7, pp. 7-28). Tillburg, The Netherlands: Tillburg University Press.
Hair, J. F. (1995). Multivariate data analysis with reading. Englewood Cliffs, NJ: Prentice Hall.
Hair, J. R., Black, W. C., Babin, B. J., & Anderson, R. E. (2010). Multivariate data analysis (7th ed.). New Jersey: Pearson Prentice Hall.
Hausman, A. (2000). A multi-method investigation of consumer motivations in impulse buying behavior. Journal of Consumer Marketing, 17(5), 403 - 426.
Haws, K. L., Bearden, W. O., & Nenkov, G. Y. (2012). Consumer spending self-control effectiveness and outcome elaboration prompts. Journal of the Academy of Marketing Science, 40(5), 695-710.
Helmers, K. F., Young, S. N., & Pihl, R. O. (1995). Assessment of measures of impulsivity in healthy male volunteers. Personality and Individual Differences, 19(6), 927-935.
Hui, S. K., Bradlow, E. T., & Fader, P. S. (2009). Testing behavioral hypotheses using an integrated model of grocery stores shopping path and purchase behavior. Journal of Consumer Research, 36(3), 478-493.
Irmak, C., Vallen, B., & Sen, S. (2010). You like what I like, but I don’t like what you like: Uniqueness motivations in product preferences. Journal of Consumer Research, 37(3), 443-455.
John, D. R., & Leong, S. M. (1985). Systematic and heuristic approaches to consumer choice: A contingent processing framework. In J. N. Sheth & C. T. Tan (Eds.), Historical perspective in consumer research: National and international perspectives (pp. 244-250). Singapore: Association for Consumer Research.
Jones, B. D. (1999). Bounded rationality. Annual Review of Political Science, 2(1), 297-321.
Jones, M. A., Reynolds, K. E., Weun, S., & Beatty, S. E. (2003). The product-specific nature of impulse buying tendency. Journal of Business Research, 56(7), 505-511.
Jordaan, Y., & Simpson, M. N. (2006). Consumer innovativeness among females in specific fashion stores in the Menlyn shopping centre. Journal of Family Ecology and Consumer Sciences, 34, 32-40.
Kacen, J. J., & Lee, J. A. (2002). The influence of culture on consumer impulsive buying behavior. Journal of Consumer Psychology, 12(2), 163-176.
Kaiser, H. F. (1974). An index of factorial simplicity. Psychometrika, 39(1), 31-36.
Kumar, S., & Mishra, B. (2012). What drives impulse buying? International Journal of Management Sciences, 1(2), 114-123.
Latane, B., & Wolf, S. (1981). The social impact of majorities and minorities. Psychological Review, 88(5), 438-453.
Loudon, D. L., & Della Bitta, A. J. (1993). Consumer behavior: Concepts and applications (1st ed.). USA: McGraw-Hill.
Luo, X. (2005). How does shopping with others influence impulsive purchasing? Journal of Consumer Psychology, 15(4), 288-294.
Lynn, M., & Harris, J. (1997). The desire for unique consumer products: A new individual differences scale. Psychology and Marketing, 14(6), 601-616.
Lynn, M., & Synder, C. R. (2002). Uniqueness seeking. In C. R. Synder & S. J. Lopez (Eds.), Handbook of positive psychology (pp. 395-410). New York: Oxford University Press.
Malter, A. J. (1996). An Introduction to embodied cognition: Implications for consumer research. In K. P. Corfman & J. G. Lynch (Eds.), Advances in consumer research (Vol. 23, pp. 272-276). Provo, UT: Association for Consumer Research.
Mangleburg, T. F., Doney, P. M., & Bristol, T. (2004). Shopping with friends and teens’ susceptibility to peer influence. Journal of Retailing, 80(2), 101-116.
March, R., & Woodside, A. G. (2005). Tourism behaviour: Travellers' decisions and actions. London, UK: CABI Publishing.
Mattila, A. S., & Wirtz, J. (2001). Congruency of scent and music as a driver of in-store evaluations and behavior. Journal of Retailing, 77(2), 273-289.
Mihić, M., & Kursan, I. (2010). Assessing the situational factors and impulsive buying behavior: Market segmentation approach. Management: Journal of Contemporary Management Issues, 15(2), 47-66.
Mowen, J. C., & Minor, M. (1997). Consumer behavior (5th ed.). New Jersey: Prentice Hall.
Nettle, D. (1999). Using Social Impact Theory to simulate language change. Lingua, 108(2–3), 95-117.
Notani, A. S. (1997). Perceptions of affordability: Their role in predicting purchase intent and purchase. Journal of Economic Psychology, 18(5), 525-546.
Ouellette, J. A., & Wood, W. (1998). Habit and intention in everyday life: The multiple processes by which past behavior predicts future behavior. Psychological Bulletin, 124(1), 54-74.
Peck, J., & Childers, T. L. (2006). If I touch it I have to have it: Individual and environmental influences on impulse purchasing. Journal of Business Research, 59(6), 765-769.
Piron, F. (1991). Defining impulse purchasing. Advances in Consumer Research, 18(1), 509-514.
Rook, D. W. (1987). The buying impulse. Journal of Consumer Research, 14(2), 189-199.
Rook, D. W., & Fisher, R. J. (1995). Normative influences on impulsive buying behavior. Journal of Consumer Research, 22(3), 305-313.
Rook, D. W., & Gardner, M. P. (1993). In the mood: Impulse buying's affective antecedents. In J. A. Costa & R. W. Belk (Eds.), Research in consumer behavior (Vol. 6, pp. 1-28). Greenwich: JAI Press.
Rook, D. W., & Hoch, S. J. (1985). Consuming impulses. In E. C. Hirschman & M. B. Holbrook (Eds.), Advances in consumer research (Vol. 12, pp. 23-27). Provo, UT: Association for Consumer Research.
Rosenblueth, A., Wiener, N., & Bigelow, J. (1943). Behavior, purpose, and teleology. Philosophy of Science, 10(1), 18-24.
Sánchez, F. J. S., & Schmidt, T. H. (2004). An analysis of consumer impulsivity and proposed sclae to measure impulse behaviour. Esic Market, Sep-Dec(119), 145-167.
Silvera, D. H., Lavack, A. M., & Kropp, F. (2008). Impulse buying: The role of affect, social influence, and subjective wellbeing. Journal of Consumer Marketing, 25(1), 23-33.
Simonson, I., & Nowlis, S. M. (2000). The role of explanations and need for uniqueness in consumer decision making: Unconventional choices based on reasons. Journal of Consumer Research, 27(1), 49-68.
Slovic, P. (2002). Rational actors or rational fools: Implications of the affect heuristic for behavioral economics. The Journal of Socioeconomics, 31(4), 329-342.
Smith, R. B., & Sherman, E. (1993). Effects of store image and mood on consumer behavior: A theoretical and empirical analysis. Advances Consumer Research, 20(1), 631.
Stern, H. (1962). The significance of impulse buying today. Journal of Marketing, 26(2), 59-62.
Tian, K. T., Bearden, W. O., & Hunter, G. L. (2001). Consumers’ need for uniqueness: Scale development and validation. Journal of Consumer Research, 28(1), 50-66.
Trumbo, C. W. (1999). Heuristic-systematic information processing and risk judgment. Risk Analysis, 19(3), 391-400.
Underhill, P. (1999). Why we buy: The science of shopping. New York: Simon & Schuster.
Verplanken, B., & Herabadi, A. (2001). Individual differences in impulse buying tendency: Feeling and no thinking. European Journal of Personality, 15(1), 71-83.
Vinson, D. E., Scott, J. E., & Lamont, L. M. (1977). The role of personal values in marketing and consumer behavior. Journal of Marketing, 41(2), 44-50.
Vohs, K. D., & Faber, R. J. (2007). Spent resources: Self-regulatory resource availability affects impulse buying. Journal of Consumer Research, 33(4), 537-547.
Weinberg, P., & Gottwald, W. (1982). Impulsive consumer buying as a result of emotions. Journal of Business Research, 10(1), 43-57.
Wertenbroch, K. (1998). Consumption self-control by rationing purchase quantities of virtue and vice. Marketing Science, 17(4), 317-337.
Wood, M. (1998). Socio-economic status, delay of gratification, and impulse buying. Journal of Economic Psychology, 19(3), 295-320.
Wu, J.-H., & Wang, Y.-M. (2006). Measuring KMS success: A respecification of the DeLone and McLean's model. Information & Management, 43(6), 728-739.
Youn, S., & Faber, R. J. (2000). Impulse buying: Its relation to personality traits and cues. In S. J. Fisher & R. J. Meyer (Eds.), Advances consumer research (Vol. 27, pp. 179-185). Provo, UT: Association for Consumer Research.
Zhou, L., & Wong, A. (2003). Consumer impulse buying and in-store stimuli in Chinese supermarkets. Journal of International Consumer Marketing, 16(2), 37-53.