Pretest

Posttest

Knowledge & Comprehension

Observation & Measurement

Perception of Characteristics as Solution to Problems

Overall Performance in All Categories Taken Together

Control

Experimental

Control

Experimental

Control

Experimental

Control

Experimental

Control

Experimental

N

135

135

135

135

135

135

135

135

135

135

Mean

9.53

9.09

2.53

3.48

2.64

3.51

3.48

4.87

8.84

11.33

STD

3.32

3.22

0.88

1. 04

0.71

0.94

1.26

0.99

3.26

3.03

Var.

10.99

10.38

0.77

1.07

0.50

0.88

1.59

0.99

10.61

9.22