title: Short-term effects of problem-based learning curriculum on students' self-directed skills development.
abstract: OBJECTIVE
  To investigate short-term effects of problem-based learning on students' scientific thinking, problem solving, and conflict resolution skills.
  
  
  METHODS
  The study was conducted in two medical schools, Ondokuz Mayis University in Samsun and Trakya University in Edirne, Turkey. The two schools used different instructional approaches in educational methods: Ondokuz Mayis University followed a problem-based learning curriculum and Trakya University a traditional didactic curriculum. Three groups of students were included as follows: (a) 83 first-year from Ondokuz Mayis University, who passed an English language proficiency exam; (b) 146 students who failed English language proficiency exam and had to spend a year attending preparatory English language classes before starting their first year at Ondokuz Mayis University (first control group); and (c) 124 students first-year students from Trakya University (second control group). All participants completed the Problem Solving Inventory, Scientific Thinking Skills Questionnaire, and Conflict Resolution Scale at the beginning of the 2003/2004 academic year. The tests were re-administered to same students at the end of the academic year, ie, 10 months later.
  
  
  RESULTS
  Analysis of covariance revealed no differences in pre-test scores among the problem-based learning, first, and second control groups in their scientific thinking (9.0+/-71.2, 8.9+/-3.2, and 8.7+/-1.3, respectively; P=0.124), problem solving (132.2+/-15.4, 131.2+/-16.2, and 132.1+/-17.4, respectively; P=0.454), and conflict resolution skills (112.3+/-14.6, 109.7+/-12.8, and 110.2+/-11.4, respectively; P=0.07). The study group in comparison with first and second control group had significantly better post-test results in scientific thinking (13.9+/-3.5, 9.5+/-2.2, and 9.1+/-2.7, respectively), problem solving (125.5+/-12.6, 130.1+/-11.2, and 131.1+/-15.4, respectively), and conflict resolution skills (125.4+/-12.7, 110.9+/-23.7, and 111.6+/-23.6, respectively) (P<0.001 for all). The skills of the two control groups did not improve in this time period and their post-test scores were not significantly different.
  
  
  CONCLUSIONS
  Problem-based learning curricula may positively affect some of the self-directed skills, such as scientific thinking, problem solving, and conflict resolution skills of students, even in a short period of time.
authors.affiliation: Department of Family Medicine, Ondokuz Mayis University Faculty of Medicine, Samsun, Turkey. myalcin@omu.edu.tr
authors.forename: Bektas Murat
authors.initials: BM
authors.lastname: Yalcin
authors.forename: Tevfik Fikret
authors.initials: TF
authors.lastname: Karahan
authors.forename: Demet
authors.initials: D
authors.lastname: Karadenizli
authors.forename: Erkan Melih
authors.initials: EM
authors.lastname: Sahin
mesh_terms: D000293:Adolescent; D003479:Curriculum; D004504:Education, Medical, Undergraduate; D005260:Female; D006801:Humans; D008297:Male; D011340:Problem Solving; D018794:Problem-Based Learning; D013337:Students, Medical / Q000523:psychology*; D013850:Thinking; D014421:Turkey