How should we teach tree-thinking? An experimental test of two hypotheses

Table 1 Percentage of undergraduate and graduate students that correctly answered each question on the post-activity assessment

Question	Undergraduate correct (%)	Mean correct (from 100,000 samples of 12 pooled scores) (%)	Graduate correct (%)	P value
1	90.8	91.1	100	0.323
2	99.6	99.6	100	0.95
3	90.8	90.7	83	0.9105
4	77.1	77.4	91.6	0.2
5	96.1	96.0	91.6	0.92
6	61.7	61.4	50	0.868
7	96	95.8	66	0.999
8	94	93.7	75	0.995
9	46.7	47.2	58.3	0.3138
10	33.6	33.6	33.3	0.617
11	83.6	83.7	91.6	0.393
12	90	90.6	100	0.304
13	74	72.4	75	0.569

Undergraduate correct is the actual proportion of the 491 undergraduates who correctly answered the question. Graduate correct is the proportion of the 12 graduate students that correctly answered the question. Mean correct is the mean of the % correct from the 100,000 draws of 12 participants from the pooled sample of undergraduates and graduates. The P value was calculated by comparing the number of draws as extreme or more extreme then the % correct for graduate students.

ISSN: 1936-6434