Predicting Intended and Self-perceived Sugar Restriction among Tanzanian Students using the Theory of Planned Behavior

Abstract

This study examines the applicability and sufficiency of the Theory of Planned Behavior (TPB) in predicting intention and self-perceived behavior with respect to avoiding between-meal intake of sugared snacks and drinks. One thousand one hundred and twenty-three Tanzanian students (mean age 26.4 years) completed self-administered questionnaires designed to measure the components of the TPB during May–July, 1999. Self-perceived sugar consumption was obtained in a subsample of respondents (n = 228) four weeks later. The TPB provided a significant prediction of intention (R ²= 0.44), with attitude (= 0.25), subjective norms (= 0.28) and perceived behavioral control (= 0.35) significant, and subsequent behavior (R ² = 0.15, with intention (= 0.25) and perceived behavioral control (= 0.18) significant. Frequency of past behavior explained a significant, albeit small, amount of additional variance in intention (1 percent) and behavior (4 percent). The results indicate that the TPB is applicable to the prediction of food choice-related intention and behavior among young adult students living in a non-occidental setting.

Keywords

past behavior self-perceived avoidance of sugared snacks sufficiency of TPB

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References

Abraham, C. , Sheeran, P. , & Orbell, S. (1998). Can social cognitive models contribute to the effectiveness of HIV-preventive behavioral interventions? A brief review of literature and a reply to Joffe (1996; 1997) and Fife-Schaw (1997).British Journal of Medical Psychology, 71, 397–310.

Ajzen, I. (1991). The Theory of Planned Behavior. Organizational Behavior and Human Decision Process, 50, 179–211.

Ajzen, I. , & Fishbein, M. (1980). Understanding attitudes and predicting social behavior. Englewood Cliffs, NJ: Prentice-Hall.

Ajzen, I. , & Madden, T. J. (1986). Prediction of goal directed behavior: Attitudes, intentions and perceived behavioral control. Journal of Experimental Social Psychology, 22, 453–474.

Ajzen, I. , & Timko, C. (1986). Correspondence between health attitudes and behavior. Journal of Basic and Applied Social Psychology, 7, 259–276.

Armitage, C. J. , & Conner, M. (1999a). Distinguishing perceptions of control from self-efficacy: Predicting consumption of a low-fat diet using the Theory of Planned Behavior.Journal of Applied Social Psychology, 29(1), 72–90.

Armitage, C. J. , & Conner, M. (1999b). The Theory of Planned Behavior: Assessment of predictive validity and perceived control.British Journal of Social Psychology, 38, 35–54.

Åstrøm, A.N. , Jackson W. , & Mwangosi, I. (2000). Knowledge, beliefs and behavior related to oral health among Tanzanian and Ugandan teacher trainees. Acta Odontologica Scandinavica, 58,11–18.

Åstrøm, A. N. , & Rise J. (1996). Expectancy-value approach to drinking of non-sugared mineral water among adolescents. Community Dentistry and Oral Epidemiology, 24, 72–78.

10.

Åstrøm, A. N. , & Rise, J. (in press). Young adults’ intention to eat healthy food: extending the theory of planned behavior. Psychology and Health.

11.

Baron, R. M. , & Kenny, D. A. (1986). The moderator–mediator variable distinction in social-psychological research: Conceptual, strategic, and statistical considerations. Journal of Personality and Social Psychology, 19(4–5), 335–361.

12.

Berg, C. , Jonsson, I. , & Conner, M. (2000). Understanding choice of milk and bread for breakfast among Swedish children aged 11–15 years: An application of the Theory of Planned Behavior. Appetite, 34, 5–19.

13.

Conner, M. , & Armitage, J. C. (1998). Extending the Theory of Planned Behavior: A review and avenues for further Research. Journal of Applied Social Psychology, 28, 1429–1464.

14.

Conner, M. , Martin, E. , Silverdale, N. , & Grogan, S. (1996). Dieting in adolescence: An application of the Theory of Planned Behavior. British Journal of Health Psychology, 1, 315–325.

15.

Conner, M. , Povey, R. , Bell, R. , & Norman, P. (1994). GP intervention to produce dietary change. Paper presented at the BPS Special group in Health psychology Annual Conference, Sheffield, 7–9 September.

16.

Conner, M. , & Sparks, P. (1996). The Theory of Planned Behavior and Health Behaviors. In: Conner, M. & Norman, P. (Eds.), Predicting health behavior, research and practice with social cognition models (pp. 148–153). Buckingham: Open University Press.

17.

Conner, M. , Warren, R. , Close, S. , & Sparks, P. (1999). Alcohol consumption and the Theory of Planned Behavior: An examination of the cognitive mediation of past behavior. Journal of Applied Social Psychology, 29, 1675–1703.

18.

Dennison, C. M. , & Shepherd, R. (1995). Adolescents’ food choice: An application of the Theory of Planned Behaviour. Journal of Human Nutrition and Dietetics, 8, 9–23.

19.

Edwards, R. , Unwin, N. , Mugusi, F. , Whiting, D. , Rashid, S. , Kissima, J. , Aspray, T. J. , Alberti, George, K. , & Alberti, M. M. (2000). Hypertension prevalence in an urban and rural area of Tanzania. Journal of Hypertension, 18, 145–152.

20.

Emblem, T. (1998). Perceived food sufficiency and dieting behavior among primary school children in Arusha and Kilimanjaro regions, Tanzania. Thesis. Faculty of Medicine, University of Oslo, Norway.

21.

Fishbein, M. , & Ajzen, I. (1975). Belief, attitude intention and behavior. An introduction to theory and research. Reading, MA: Addison-Wesley.

22.

Fishbein, M. and Middlestadt, S. E. (1989). Using the theory of reasoned action as a framework for understanding and changing AIDS-related behaviors. In V. M. Mays , G. W. Albee , & S. F. Schneider (Eds.), Primary prevention of AIDS (pp. 93–114). London: Sage.

23.

Godin, G. , & Kok, G. (1996). The Theory of Planned Behavior: A review of its applications to health-related behaviors. American Journal of Health Promotion, 11, 87–98.

24.

Gummeson, L. , Jonsson, I. , & Conner, M. (1997). Predicting intentions and behavior of Swedish 10–16-year-olds at breakfast. Food Quality and Preferences, 8, 297–306.

25.

Keruso, E. , Keruso, H. , Kallio, P. , & Nyandindi, U. (1986). Oral health status among teenage school children in Dar es Salaam, Tanzania. Community Dentistry Oral Epidemiology, 14, 338–340.

26.

Kida, I. A. , & Åstrøm, A. N. (1998). Correlates of the intention to avoid intake of sugared snacks among Tanzanian adolescents. Journal of Gender, Culture and Health, 3, 171–182.

27.

Manstead, A. S. R. , & Parker, D. (1995). Evaluating and extending the Theory of Planned Behavior. In W. Stroebe and M. Hewstone (Eds.), European Review of Social Psychology, Volume 6 (pp. 69–95). Chichester: John Wiley.

28.

Mazengo, M. C. Simell, O. , Lukmanji, Z. , Shrima, R. , & Karvetti, R. L. (1997). Food consumption in rural and urban tanzania. Acta Tropica, 68, 313–326.

29.

McDowell I. , & Newell C (1996). The theoretical and technical foundations of health measurement. In: I. McDowell & C. Newell (Ed.), Measuring health. A guide to rating scales and questionnaires (2nd ed) (pp. 10–46) New York: Oxford University Press.

30.

Ministry of Health . (1997). Policy implications of adult morbidity and mortality. Dar es Salaam: Tanzania.

31.

Miura, H. , Yoshima, A. , Haraguchi, K. , Arai, Y. , & Umenai, T (1997). Socio-economic factors and dental caries in developing countries: A cross national study. Social Science and Medicine, 44,269–272.

32.

Morrison, D. M. , Rogers Gillmore, M. , & Baker, S. A. (1995). Determinants of condom use among high-risk heterosexual adults: A test of the Theory of Reasoned Action. Journal of Applied Social Psychology, 25, 651–676.

33.

Mullen, P. D. , Hersey, J. C. , & Iverson, D. C. (1987). Health behavior models compared. Social Science and Medicine, 24, 973–983.

34.

Murray, C. J. L. , & Lopez, A. D. (1997). Global mortality, disability and the contribution of risk factors: Global Burden of Disease study. Lancet, 349,1498–1504.

35.

Muya, R. J. (1995). Integration of primary oral health care into primary health care: Tanzanian experience. In W. Mautch & A. Sheiham (Eds.), Promoting oral health in deprived communities (pp. 447–452). Berlin: German Foundation of International Development.

36.

Nasser, M. (1988). Culture and weight consciousness. Journal of Psychosomatic Research, 32, 573–577.

37.

Nguyen, M. , Otis, J. , & Potvin, L. (1996). Determinants of intention to adopt a low-fat diet in men 30 to 60 years old: Implications for heart health promotion. American Journal of Health Promotion, 10,201–206.

38.

Norman, P. , & Conner, M. (1996). The role of social cognition models in predicting health behaviors: Future directions. In M. Conner & P. Norman (Eds.), Predicting Health Behavior (pp. 197–225). Buckingham: Open University Press.

39.

Nyandindi, U. , Palin-Palokas, T. , Milen, A. , Robinson, V. , & Kombe, N. (1994). Oral health knowledge, attitudes, behavior and skills of children entering schools in urban and rural areas of Tanzania. Public Health, 108, 35–40.

40.

Øygard, L. , & Rise, J. (1996). Predicting the intention to eat healthier foods among young adults. Health Education Research, 11, 453–461.

41.

Paisley, C. M. , Lloyd, H. , Sparks, P. & Mela, D. J. (1995). Consumer perceptions of dietary changes for reducing fat intake. Nutrition Research, 15,1755–1766.

42.

Paisley, C. M. , & Sparks, P. (1998). Expectations of reducing fat intake: The role of perceived need within the Theory of Planned Behavior. Psychology and Health, 33, 341–353.

43.

Povey, R. , Conner, M. , Sparks, P. , Rhiannon J. , & Shepherd, R. (1999). The Theory of Planned Behavior and healthy eating: Examining additive and moderating effects of social influence variables. Psychology and Health, 15, 1–16.

44.

Raats, M. M. , Shepherd, R. , & Sparks, P. (1995). Including moral dimensions of choice within the structure of the theory of planned behavior. Journal of Applied Social Psychology, 25, 484–494.

45.

Rise, J. , & Lugoe, W. (1999). Predicting intended condom use among Tanzanian students using the Theory of Planned Behavior. Journal of Health Psychology, 4, 497–506.

46.

Rise, J. , Åstrøm, A. N. , & Sutton, S. (1998). Prediction of intention and use of dental floss among adolescents. An application of the Theory of Planned Behavior. Psychology and Health, 13, 223–236.

47.

Sparks, P. , Guthrie, C. A. , & Shepherd, R. (1997). The dimensional structure of the perceived behavioral control construct. Journal of Applied Social Psychology, 27, 418–438.

48.

Sparks, P. , & Shepherd, R. (1992). Self-identity and the Theory of Planned Behavior—assessing the role of identification with green consumerism. Social Psychology Quarterly, 55, 388–399.

49.

Sutton, S. R. , (1994). The past predicts the future: Interpreting behavior–behavior relationships in social psychological models of health behaviors. In D. R. Rutter & L. Quine (Eds.), Social psychology and health: European perspectives (pp. 71–88). Aldershot: Averbury.

50.

Sutton, S. (1998). Predicting and explaining intentions and behavior: How well are we doing? Journal of Applied Social Psychology, 28, 1317–1338.

51.

Towler, G. , & Shepherd, R. (1991). Modification of Fishbein’s and Ajzen’s Theory of Reasoned Action to predict chip consumption. Food Quality and Preferences, 3, 37–45.

52.

Wilson, D. , Zenda, A. , McMaster, J. , & Lavelle, S. (1992). Factors predicting Zimbawean students’ intentions to use condoms. Psychology and Health, 7, 99–114.

53.

World Health Organisation. (1990). Study group on diet, nutrition and the prevention of chronic diseases. World Health Organisation, Technical Report Series 797, Geneva.

54.

World Health Report . (1997). Obesity—preventing and managing the global epidemic. Report on a WHO Consultation on Obesity. Geneva: World Health Organization.