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AIDS Research and Treatment
Volume 2012, Article ID 345327, 18 pages
http://dx.doi.org/10.1155/2012/345327
Review Article

Nothing as Practical as a Good Theory? The Theoretical Basis of HIV Prevention Interventions for Young People in Sub-Saharan Africa: A Systematic Review

1International Centre for Reproductive Health, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan 185 P3, 9000 Ghent, Belgium
2Centre for Health Policy, School of Public Health, University of the Witwatersrand, Johannesburg 2000, South Africa
3Department of Sociology, Faculty of Political and Social Sciences, Ghent University, 9000 Ghent, Belgium

Received 29 February 2012; Revised 26 April 2012; Accepted 3 May 2012

Academic Editor: Xiaoming Li

Copyright © 2012 Kristien Michielsen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Linked References

  1. UNAIDS: UNAIDS World AIDS Day Report 2011, How to get to zero: Faster. Smarter. Better, Geneva, Switzerland, 2011.
  2. T. J. Coates, L. Richter, and C. Caceres, “Behavioural strategies to reduce HIV transmission: how to make them work better,” The Lancet, vol. 372, no. 9639, pp. 669–684, 2008. View at Publisher · View at Google Scholar · View at Scopus
  3. C. Marston and E. King, “Factors that shape young people's sexual behaviour: a systematic review,” The Lancet, vol. 368, no. 9547, pp. 1581–1586, 2006. View at Publisher · View at Google Scholar · View at Scopus
  4. K. Michielsen, M. F. Chersich, S. Luchters, P. de Koker, R. van Rossem, and M. Temmerman, “Effectiveness of HIV prevention for youth in sub-Saharan Africa: systematic review and meta-analysis of randomized and nonrandomized trials,” AIDS, vol. 24, no. 8, pp. 1193–1202, 2010. View at Publisher · View at Google Scholar · View at Scopus
  5. S. M. N. Mavedzenge, A. M. Doyle, and D. A. Ross, “HIV prevention in young people in sub-Saharan Africa: a systematic review,” Journal of Adolescent Health, vol. 49, no. 6, pp. 568–586, 2011. View at Publisher · View at Google Scholar · View at Scopus
  6. D. B. Kirby, B. A. Laris, and L. A. Rolleri, “Sex and HIV education programs: their impact on sexual behaviors of young people throughout the world,” Journal of Adolescent Health, vol. 40, no. 3, pp. 206–217, 2007. View at Publisher · View at Google Scholar · View at Scopus
  7. J. Green, “The role of theory in evidence-based health promotion practice,” Health Education Research, vol. 15, no. 2, pp. 125–129, 2000. View at Google Scholar · View at Scopus
  8. M. Fishbein, “The role of theory in HIV prevention,” AIDS Care, vol. 12, no. 3, pp. 273–278, 2000. View at Google Scholar · View at Scopus
  9. Family Health International, Behavior Change—A Summary of Four Major Theories, Family Health International, Arlington, Tex, USA, 2002.
  10. D. R. Rutter and L. Quine, Changing Health Behaviour. Intervention and Research with Social Cognitive Models, Open University Press, Philadelphia, Pa, USA, 2002.
  11. D. C. Des Jarlais, C. Lyles, N. Crepaz, and Group T, “Improving the reporting quality of nonrandomized evaluations of behavioral and public health interventions: the TREND statement,” American Journal of Public Health, vol. 94, no. 3, pp. 361–366, 2004. View at Google Scholar · View at Scopus
  12. J. B. Jemmott and L. S. Jemmott, “HIV risk reduction behavioral interventions with heterosexual adolescents,” AIDS, vol. 14, supplement 2, pp. S40–S52, 2000. View at Google Scholar · View at Scopus
  13. B. T. Johnson, M. P. Carey, K. L. Marsh, K. D. Levin, and L. A. J. Scott-Sheldon, “Interventions to reduce sexual risk for the human immunodeficiency virus in adolescents, 1985–2000: a research synthesis,” Archives of Pediatrics and Adolescent Medicine, vol. 157, no. 4, pp. 381–388, 2003. View at Publisher · View at Google Scholar · View at Scopus
  14. J. D. Fisher and W. A. Fisher, “Changing AIDS-risk behavior,” Psychological Bulletin, vol. 111, no. 3, pp. 455–474, 1992. View at Google Scholar · View at Scopus
  15. J. A. Kelly and S. C. Kalichman, “Behavioral research in HIV/AIDS primary and secondary prevention: recent advances and future directions,” Journal of Consulting and Clinical Psychology, vol. 70, no. 3, pp. 626–639, 2002. View at Publisher · View at Google Scholar · View at Scopus
  16. J. P. Moatti and Y. Souteyrand, “Editorial: HIV/AIDS social and behavioural research: past advances and thoughts about the future,” Social Science and Medicine, vol. 50, no. 11, pp. 1519–1532, 2000. View at Publisher · View at Google Scholar · View at Scopus
  17. K. Glanz, B. K. Rimer, and F. M. Lewis, Health Behavior and Health Education. Theory, Research and Practice, John Wiley & Sons, San Francisco, Calif, USA, 2002.
  18. K. Glanz and D. B. Bishop, “The role of behavioral science theory in development and implementation of public health interventions,” Annual Review of Public Health, vol. 31, pp. 399–418, 2010. View at Publisher · View at Google Scholar · View at Scopus
  19. J. E. Painter, C. P. C. Borba, M. Hynes, D. Mays, and K. Glanz, “The use of theory in health behavior research from 2000 to 2005: a systematic review,” Annals of Behavioral Medicine, vol. 35, no. 3, pp. 358–362, 2008. View at Publisher · View at Google Scholar · View at Scopus
  20. National Cancer Institute, Theory at Glance. A Guide for Health Promotion Practice, National Cancer Institute, Washington, DC, USA, 2005.
  21. K. Glanz, F. M. Lewis, and B. K. Rimers, Health Behavior and Health Education: Theory, Research, and Practice, Jossey-Bass, San Francisco, Calif, USA, 1990.
  22. A. Bandura, “Self-efficacy: toward a unifying theory of behavioral change,” Psychological Review, vol. 84, no. 2, pp. 191–215, 1977. View at Publisher · View at Google Scholar · View at Scopus
  23. A. Bandura, Self-Efficacy: The Exercise of Control, Freeman, New York, NY, USA, 1997.
  24. I. M. Rosenstock, V. J. Strecher, and M. H. Becker, “Social learning theory and the Health Belief Model,” Health Education Quarterly, vol. 15, no. 2, pp. 175–183, 1988. View at Google Scholar · View at Scopus
  25. I. Rosenstock, “Historical origins of the health belief model,” Health Education Quarterly, vol. 2, no. 4, pp. 328–335, 1974. View at Google Scholar
  26. M. H. Becker, “THe health belief model and personal health behavior,” Health Education Quarterly, vol. 2, no. 4, pp. 324–508, 1974. View at Google Scholar
  27. I. Ajzen and B. L. Driver, “Prediction of leisure participation from behavioral, normative, and control beliefs: an application of the theory of planned behavior,” Leisure Sciences, vol. 13, no. 3, pp. 185–204, 1991. View at Google Scholar · View at Scopus
  28. I. Ajzen and M. Fishbein, Understanding Attitudes and Predicting Social Behavior, Prentice Hall, Upper Saddle River, NJ, USA, 1980.
  29. J. O. Prochaska and C. C. DiClemente, “Stages and processes of self-change of smoking: toward an integrative model of change,” Journal of Consulting and Clinical Psychology, vol. 51, no. 3, pp. 390–395, 1983. View at Publisher · View at Google Scholar · View at Scopus
  30. U. Bronfenbrenner, The Ecology of Human Development: Experiments by Nature and Design, Harvard University Press, Cambridge, Mass, USA, 1979.
  31. R. van Rossem and D. Meekers, “An evaluation of the effectiveness of targeted social marketing to promote adolescent and young adult reproductive health in Cameroon,” AIDS Education and Prevention, vol. 12, no. 5, pp. 383–404, 2000. View at Google Scholar · View at Scopus
  32. I. S. Speizer, B. O. Tambashe, and S. P. Tegang, “An evaluation of the “Entre Nous Jeunes” peer-educator program for adolescents in Cameroon,” Studies in Family Planning, vol. 32, no. 4, pp. 339–351, 2001. View at Google Scholar · View at Scopus
  33. D. Meekers, S. Agha, and M. Klein, “The impact on condom use of the “100% Jeune” social marketing program in Cameroon,” Journal of Adolescent Health, vol. 36, no. 6, article 530, 2005. View at Publisher · View at Google Scholar · View at Scopus
  34. K. I. Klepp, S. S. Ndeki, M. T. Leshabari, P. J. Hannan, and B. A. Lyimo, “AIDS education in Tanzania: promoting risk reduction among primary school children,” American Journal of Public Health, vol. 87, no. 12, pp. 1931–1936, 1997. View at Google Scholar · View at Scopus
  35. K. I. Klepp, S. S. Ndeki, A. M. Seha et al., “AIDS education for primary school children in Tanzania: an evaluation study,” AIDS, vol. 8, no. 8, pp. 1157–1162, 1994. View at Google Scholar · View at Scopus
  36. D. A. Shuey, B. B. Babishangire, S. Omiat, and H. Bagarukayo, “Increased sexual abstinence among in-school adolescents as a result of school health education in Soroti district, Uganda,” Health Education Research, vol. 14, no. 3, pp. 411–419, 1999. View at Publisher · View at Google Scholar · View at Scopus
  37. J. Kinsman, J. Nakiyingi, A. Kamali et al., “Evaluation of a comprehensive school-based aids education programme in rural Masaka, Uganda,” Health Education Research, vol. 16, no. 1, pp. 85–100, 2001. View at Google Scholar · View at Scopus
  38. A. S. Erulkar, L. I. A. Ettyang, C. Onoka, F. K. Nyagah, and A. Muyonga, “Behavior change evaluation of a culturally consistent reproductive health program for young Kenyans,” International Family Planning Perspectives, vol. 30, no. 2, pp. 58–67, 2004. View at Google Scholar · View at Scopus
  39. D. A. Ross, J. Changalucha, A. I. Obasi et al., “Biological and behavioural impact of an adolescent sexual health intervention in Tanzania: a community-randomized trial,” AIDS, vol. 21, no. 14, pp. 1943–1955, 2007. View at Publisher · View at Google Scholar · View at Scopus
  40. A. M. Doyle, D. A. Ross, K. Maganja et al., “Long-term biological and behavioural impact of an adolescent sexual health intervention in tanzania: follow-up survey of the community-based mema kwa vijana trial,” PLoS Medicine, vol. 7, no. 6, Article ID e1000287, 2010. View at Publisher · View at Google Scholar · View at Scopus
  41. E. Maticka-Tyndale, J. Wildish, and M. Gichuru, “Quasi-experimental evaluation of a national primary school HIV intervention in Kenya,” Evaluation and Program Planning, vol. 30, no. 2, pp. 172–186, 2007. View at Publisher · View at Google Scholar · View at Scopus
  42. L. E. Rijsdijk, A. E. Bos, R. A. Ruiter, J. N. Leerlooijer, and B. de Haas, “The world starts with me: a multilevel evaluation of a comprehensive sex education programme targeting adolescents in Uganda,” BMC Public Health, vol. 11, article 334, 2011. View at Publisher · View at Google Scholar · View at Scopus
  43. L. Kuhn, M. Sternberg, and C. Mathews, “Participation of the school community in AIDS education: an evaluation of a high school programme in South Africa,” AIDS Care, vol. 6, no. 2, pp. 161–171, 1994. View at Google Scholar · View at Scopus
  44. B. Harvey, J. Stuart, and T. Swan, “Evaluation of a drama-in-education programme to increase AIDS awareness in South African high schools: a randomized community intervention trial,” International Journal of STD and AIDS, vol. 11, no. 2, pp. 105–111, 2000. View at Publisher · View at Google Scholar · View at Scopus
  45. D. Meekers, The Effectiveness of Targeted Social Marketing to Promote Adolescent Reproductive Health: the Case of Soweto, South Africa, Population Services International Working Paper, no. 16, 1998.
  46. A. M. Fitzgerald, B. F. Stanton, N. Terreri et al., “Use of Western-based HIV risk-reduction interventions targeting adolescents in an african setting,” Journal of Adolescent Health, vol. 25, no. 1, pp. 52–61, 1999. View at Publisher · View at Google Scholar · View at Scopus
  47. B. F. Stanton, X. Li, J. Kahihuata et al., “Increased protected sex and abstinence among Namibian youth following a HIV risk-reduction intervention: a randomized, longitudinal study,” AIDS, vol. 12, no. 18, pp. 2473–2480, 1998. View at Google Scholar · View at Scopus
  48. Y. M. Kim, A. Kols, R. Nyakauru, C. Marangwanda, and P. Chibatamoto, “Promoting sexual responsibility among young people in Zimbabwe,” International Family Planning Perspectives, vol. 27, no. 1, pp. 11–19, 2001. View at Google Scholar · View at Scopus
  49. S. James, P. S. Reddy, R. A. C. Ruiter et al., “The effects of a systematically developed photo-novella on knowledge, attitudes, communication and behavioural intentions with respect to sexually transmitted infections among secondary school learners in South Africa,” Health Promotion International, vol. 20, no. 2, pp. 157–165, 2005. View at Publisher · View at Google Scholar · View at Scopus
  50. M. J. Visser, “Life skills training as HIV/AIDS preventive strategy in secondary schools: evaluation of a large-scale implementation process,” Journal of Social Aspects of HIV/AIDS Research Alliance, vol. 2, no. 1, pp. 203–216, 2005. View at Google Scholar · View at Scopus
  51. C. Underwood, H. Hachonda, E. Serlemitsos, and U. Bharath-Kumar, “Reducing the risk of HIV transmission among adolescents in Zambia: psychosocial and behavioral correlates of viewing a risk-reduction media campaign,” Journal of Adolescent Health, vol. 38, no. 1, pp. 55.e1–55.e13, 2006. View at Publisher · View at Google Scholar · View at Scopus
  52. R. Magnani, K. MacIntyre, A. M. Karim et al., “The impact of life skills education on adolescent sexual risk behaviors in KwaZulu-Natal, South Africa,” Journal of Adolescent Health, vol. 36, no. 4, pp. 289–304, 2005. View at Publisher · View at Google Scholar · View at Scopus
  53. S. Agha, “An evaluation of the effectiveness of a peer sexual health intervention among secondary-school students in Zambia,” AIDS Education and Prevention, vol. 14, no. 4, pp. 269–281, 2002. View at Google Scholar · View at Scopus
  54. S. James, P. Reddy, R. A. C. Ruiter, A. McCauley, and B. van den Borne, “The impact of an HIV and AIDS life skills program on secondary school students in Kwazulu-Natal, South Africa,” AIDS Education and Prevention, vol. 18, no. 4, pp. 281–294, 2006. View at Publisher · View at Google Scholar · View at Scopus
  55. A. Plautz, D. Meekers, and J. Neukom, The Impact of the Madagascar TOP Rseau Social Marketing Program on Sexual Behavior and Use of Reproductive Health Services, PSI Research Division Working Paper no. 57, 2003.
  56. A. P. Karnell, P. K. Cupp, R. S. Zimmerman, S. Feist-Price, and T. Bennie, “Efficacy of an American alcohol and HIV prevention curriculum adapted for use in South Africa: results of a pilot study in five township schools,” AIDS Education and Prevention, vol. 18, no. 4, pp. 295–310, 2006. View at Publisher · View at Google Scholar · View at Scopus
  57. M. J. Visser, “HIV/AIDS prevention through peer education and support in secondary schools in South Africa,” Journal of Social Aspects of HIV/AIDS Research Alliance, vol. 4, no. 3, pp. 678–694, 2007. View at Google Scholar · View at Scopus
  58. R. Jewkes, M. Nduna, J. Levin et al., “Impact of stepping stones on incidence of HIV and HSV-2 and sexual behaviour in rural South Africa: cluster randomised controlled trial,” The British Medical Journal, vol. 337, no. 7666, pp. 391–395, 2008. View at Publisher · View at Google Scholar · View at Scopus
  59. R. Jewkes, M. Nduna, J. Levin et al., “A cluster randomized-controlled trial to determine the effectiveness of stepping stones in preventing HIV infections and promoting safer sexual behaviour amongst youth in the rural Eastern Cape, South Africa: trial design, methods and baseline findings,” Tropical Medicine and International Health, vol. 11, no. 1, pp. 3–16, 2006. View at Publisher · View at Google Scholar · View at Scopus
  60. M. K. Tibbits, E. A. Smith, L. L. Caldwell, and A. J. Flisher, “Impact of HealthWise South Africa on polydrug use and high-risk sexual behavior,” Health Education Research, vol. 26, no. 4, pp. 653–663, 2011. View at Publisher · View at Google Scholar · View at Scopus
  61. A. J. Mason-Jones, C. Mathews, and A. J. Flisher, “Can peer education make a difference? Evaluation of a South African adolescent peer education program to promote sexual and reproductive health,” AIDS and Behavior, vol. 15, no. 8, pp. 1605–1611, 2011. View at Publisher · View at Google Scholar · View at Scopus
  62. S. J. Baird, R. S. Garfein, C. T. McIntosh, and B. Ozler, “Effect of a cash transfer programme for schooling on prevalence of HIV and herpes simplex type 2 in Malawi: a cluster randomised trial,” The Lancet, vol. 379, no. 9823, pp. 1320–1329, 2012. View at Publisher · View at Google Scholar · View at Scopus
  63. S. M. Burnett, M. R. Weaver, P. N. Mody-Pan, L. A. Reynolds Thomas, and C. M. Mar, “Evaluation of an intervention to increase human immunodeficiency virus testing among youth in Manzini, Swaziland: a randomized control trial,” Journal of Adolescent Health, vol. 48, no. 5, pp. 507–513, 2011. View at Publisher · View at Google Scholar · View at Scopus
  64. W. R. Brieger, G. E. Delano, C. G. Lane, O. Oladepo, and K. A. Oyediran, “West African youth initiative: outcome of a reproductive health education program,” Journal of Adolescent Health, vol. 29, no. 6, pp. 436–446, 2001. View at Publisher · View at Google Scholar · View at Scopus
  65. I. O. Fawole, M. C. Asuzu, S. O. Oduntan, and W. R. Brieger, “A school-based AIDS education programme for secondary school students in Nigeria: a review of effectiveness,” Health Education Research, vol. 14, no. 5, pp. 675–683, 1999. View at Google Scholar · View at Scopus
  66. F. E. Okonofua, P. Coplan, S. Collins et al., “Impact of an intervention to improve treatment-seeking behavior and prevent sexually transmitted diseases among Nigerian youths,” International Journal of Infectious Diseases, vol. 7, no. 1, pp. 61–73, 2003. View at Publisher · View at Google Scholar · View at Scopus
  67. R. van Rossem and D. Meekers, An evaluation of the Effectiveness of Targeted Social Marketing to Promote Adolescent Reproductive Health in Guinea, PSI Research Division Working Paper no. 23, 1999.
  68. K. A. Atwood, S. B. Kennedy, S. Shamblen et al., “Impact of school-based HIV prevention program in post-conflict Liberia,” AIDS Education and Prevention, vol. 24, no. 1, pp. 68–77, 2012. View at Publisher · View at Google Scholar · View at Scopus
  69. M. Visser, “Evaluation of the first AIDS kit, the AIDS and lifestyle education programme for teenagers,” South African Journal of Psychology, vol. 26, no. 2, pp. 103–113, 1996. View at Google Scholar · View at Scopus
  70. C. T. Pedlow and M. P. Carey, “HIV sexual risk-reduction interventions for youth: a review and methodological critique of randomized controlled trials,” Behavior Modification, vol. 27, no. 2, pp. 135–190, 2003. View at Publisher · View at Google Scholar · View at Scopus
  71. L. Robin, P. Dittus, D. Whitaker et al., “Behavioral interventions to reduce incidence of HIV, STD, and pregnancy among adolescents: a decade in review,” Journal of Adolescent Health, vol. 34, no. 1, pp. 3–26, 2004. View at Publisher · View at Google Scholar · View at Scopus
  72. D. Kasprzyk, D. E. Montano, and M. Fishbein, “Application of an integrated behavioral model to predict condom use: a prospective study among high HIV risk groups,” Journal of Applied Social Psychology, vol. 28, no. 17, pp. 1557–1583, 1998. View at Google Scholar · View at Scopus
  73. J. de Wit, L. Breeman, and L. Woertman, “Hoe beredeneerd is seksueel gedrag van jongeren?” Tijdschrift voor Sociologie, vol. 29, no. 3, pp. 125–131, 2005. View at Google Scholar
  74. L. H. Dawson, M. C. Shih, C. de Moor, and L. Shrier, “Reasons why adolescents and young adults have sex: associations with psychological characteristics and sexual behavior,” Journal of Sex Research, vol. 45, no. 3, pp. 225–232, 2008. View at Publisher · View at Google Scholar · View at Scopus
  75. C. Underwood, J. Skinner, N. Osman, and H. Schwandt, “Structural determinants of adolescent girls' vulnerability to HIV: views from community members in Botswana, Malawi, and Mozambique,” Social Science and Medicine, vol. 73, no. 2, pp. 343–350, 2011. View at Publisher · View at Google Scholar · View at Scopus
  76. S. Leclerc-Madlala, “Age-disparate and intergenerational sex in southern Africa: the dynamics of hypervulnerability,” AIDS, vol. 22, supplement 4, pp. S17–S25, 2008. View at Google Scholar · View at Scopus
  77. K. Hawkins, N. Price, and F. Mussa, “Milking the cow: young women's construction of identity and risk in age-disparate transactional sexual relationships in Maputo, Mozambique,” Global Public Health, vol. 4, no. 2, pp. 169–182, 2009. View at Publisher · View at Google Scholar · View at Scopus
  78. M. Hunter, “The materiality of everyday sex: thinking beyond ‘prostitution’,” African Studies, vol. 61, no. 1, pp. 99–120, 2002. View at Google Scholar
  79. M. Silberschmidt and V. Rasch, “Adolescent girls, illegal abortions and “sugar-daddies” in Dar es Salaam: vulnerable victims and active social agents,” Social Science and Medicine, vol. 52, no. 12, pp. 1815–1826, 2001. View at Publisher · View at Google Scholar · View at Scopus
  80. J. Wamoyi, A. Fenwick, M. Urassa, B. Zaba, and W. Stones, “‘Women's bodies are shops’: beliefs about transactional ex and implications for understanding gender power and HIV prevention in Tanzania,” Archives of Sexual Behavior, vol. 40, no. 1, pp. 5–15, 2011. View at Publisher · View at Google Scholar · View at Scopus
  81. J. Wamoyi, D. Wight, M. Plummer, G. H. Mshana, and D. Ross, “Transactional sex amongst young people in rural northern Tanzania: an ethnography of young women's motivations and negotiation,” Reproductive Health, vol. 7, no. 1, article 2, 2010. View at Publisher · View at Google Scholar · View at Scopus
  82. B. Bastard, L. Cardia-Vonèche, D. Peto, and L. van Campenhoudt, “Relationships between sexual partners and ways of adapting to the risk of AIDS: landmarks for a relationship-oriented conceptual framework,” in Sexual Interactions and HIV Risk New Conceptual Perspectives in European Research, L. van Campenhoudt, M. Cohen, G. Guizzardi, and D. Hausser, Eds., Taylor & Francis, London, UK, 1997. View at Google Scholar
  83. E. Sumartojo, “Structural factors in HIV prevention: concepts, examples, and implications for research,” AIDS, vol. 14, supplement 1, pp. S3–S10, 2000. View at Publisher · View at Google Scholar · View at Scopus
  84. G. R. Gupta, J. O. Parkhurst, J. A. Ogden, P. Aggleton, and A. Mahal, “Structural approaches to HIV prevention,” The Lancet, vol. 372, no. 9640, pp. 764–775, 2008. View at Publisher · View at Google Scholar · View at Scopus
  85. A. Harrison, M. L. Newell, J. Imrie, and G. Hoddinott, “HIV prevention for South African youth: which interventions work? A systematic review of current evidence,” BMC Public Health, vol. 10, article 102, 2010. View at Publisher · View at Google Scholar · View at Scopus
  86. A. C. Gielen and D. Sleet, “Application of behavior-change theories and methods to injury prevention,” Epidemiologic Reviews, vol. 25, pp. 65–76, 2003. View at Publisher · View at Google Scholar · View at Scopus
  87. A. Baban and C. Crciun, “Changing health-risk behaviors: a review of theory and evidence-based interventions in health psychology,” Journal of Cognitive and Behavioral Psychotherapies, vol. 7, no. 1, pp. 45–67, 2007. View at Google Scholar · View at Scopus