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Table 4 Analysis of each task regarding correct solutions, transfer of numerical information and Bayesian computations*

From: Explaining computation of predictive values: 2 × 2 table versus frequency tree. A randomized controlled trial [ISRCTN74278823]

 

Correct solution

 

Training session

Follow-up examination

 

frequency tree

(n = 94)

2 × 2 table

(n = 90)

frequency tree

(n = 74)

2 × 2 table

(n = 75)

Task A

67 (71)

66 (73)

18 (24)

25 (33)

Task B

63 (67)

64 (71)

22 (30)

24 (32)

Task C

69 (73)

63 (70)

19 (26)

23 (31)

Task D

67 (71)

54 (60)

21 (28)

23 (31)

Task E

43 (46)

50 (56)

18 (24)

20 (27)

 

Correct transfer

 

Training session

Follow-up examination

 

frequency tree

(n = 94)

2 × 2 table

(n = 90)

frequency tree

(n = 74)

2 × 2 table

(n = 75)

Task A

84 (89)

79 (88)

53 (72)

57 (76)

Task B

83 (88)

78 (87)

52 (70)

57 (76)

Task C

71 (76)

65 (72)

45 (61)

53 (71)

Task D

73 (78)

67 (74)

42 (57)

49 (65)

Task E

54 (57)

53 (59)

42 (57)

48 (64)

 

Correct Bayesian Computation

 

Training session

Follow-up examination

 

frequency tree

(n = 94)

2 × 2 table

(n = 90)

frequency tree

(n = 74)

2 × 2 table

(n = 75)

Task A

62 (66)

59 (66)

13 (18)

18 (24)

Task B

60 (64)

58 (64)

17 (23)

18 (24)

Task C

70 (75)

60 (67)

15 (20)

15 (20)

Task D

69 (73)

52 (58)

16 (22)

17 (23)

Task E

46 (49)

44 (49)

15 (20)

15 (20)

  1. * Values are numbers (percentages) of tasks