. 2010 Sep 30;16(2):151–165. doi: 10.1007/s10459-010-9250-7

Table 2.

Time needed for problem representation (T1) and performance ratings per DVD, for each group of raters

Variable	DVD 1 (prototypical, derma case)		DVD 2 (complex, cardio case)
Variable	Experts (N = 18)	Non-experts (N = 16)	Experts (N = 18)	Non-experts (N = 16)
T1 (seconds)	112.0 (121)	109.5 (237)	260.0 (308)	1390 (110)
R1T1 (rating at T1)	2.0 (2)^a	2.0 (2)	3.0 (1)^a	3.0 (1)^a
R1T2 (rating at T2, after viewing entire DVD)	2.0 (1)^b	2.0 (1)	2.0 (2)^b	2.5 (1)^b

Presented are the median and the inter-quartile range (in parentheses). Experts take significantly (U = 79.00, p = .03, ES = 0.38) more time for monitoring and gathering of information than novices when observing performance on DVD 2 (cardio case). Rating scores are based on a 5-point scale (1 = poor, 5 = outstanding)

Values in the same column (DVD 1 and DVD 2 resp.) with different superscripts differ significantly (Wilcoxon Signed Ranks test, p < .05)