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HOME-STUDY DRIVER EDUCATION

MEAN CPI ATTITUDE SCORE

80 70 60 50 40 30 20 10 0

Classroom

Pen

CD-ROM

Workbook

Overall

Correct assignment

Driver training

No driver training

Computer

No computer

STATISTICAL COMPARISON

Figure 2. Mean CPI attitude scores by instruction method and statistical comparison.

Table 7

Comparisons of H Classroom

ome-Study Instruction Methods and Instruction on CPI Attitudes

Overall

3, 1303

56.41

2.90*

.01

+0.87

+1.59*

+0.51

Correctly assigned

3, 1066

53.78

1.43

.00

+0.34

+1.23

+0.44

Driver training

3, 355

51.55

0.90

.01

-1.91

-0.10

-0.22

No driver training

3, 689

55.22

2.34†

.01

+2.27

+1.83

+0.72

Computer

3, 487

54.93

3.09*

.02

+2.87

+2.59†

+1.02

No computer

2, 199

55.97

0.31

.00

+2.51

+0.32

Statistical comparison

*p < .05. †p < .10 (trend).

η2

Mean difference (MHome-Study

PEN

CD-ROM

– MClassroom ) Workbook

dfb, dfw

ANOVA MSE

F

The results of the analyses on CPI attitude scores indicate only one significant difference between the classroom and home-study students. Specifically, for the analysis including all students, regardless of whether or not they were correctly assigned, those students completing the CD course had better attitudes than did those who completed

the classroom course (p < .05). The results of correctly assigned student who did not take

the analysis that was limited to driver training and had access

only to a

computer when they were assigned to an instruction CD students had better attitudes than did classroom difference just barely did not reach the less than .05

method also suggested that the students (p = .05), although the level required to be considered

statistically significant. This finding mean is actually even higher than that

may seem for the CD

strange given that the PEN attitude course, however, the difference is not

statistically significant (p > .05) because of classroom comparison due to PEN’s smaller

the lower power involved in sample size. Statistical power

the PEN-to- refers to the

25

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