Table 4.
Individual experiments | Complete factorial design | Fractional factorial design (half fraction) | |
---|---|---|---|
Interaction effects | Cannot be estimated | All can be estimated | Two-way interactions can be estimated |
Number of experimental conditions | 10 | 32 | 16 |
Experimental condition costs @ $2,000/condition | $20,000 | $64,000 | $32,000 |
Number of subjects | 2,525 | 505 | 505 |
Subject costs @ $100/subject | $252,500 | $50,500 | $50,500 |
Total costs | $272,500 | $114,500 | $82,500 |