Table 1.
Effects of sex of best friends on antisocial behavior in 6th, 7th, and 8th grades
| df | F | η2 | p | |
|---|---|---|---|---|
| 6th Grade | ||||
| Friends | 1 | 5.71** | .006 | .02 |
| Sexa | 1 | 3.44* | .004 | .06 |
| Sex friends* | 1 | 1.23 | .001 | .27 |
| Error | 944 | (.320) | ||
| 7th Grade | ||||
| Friends | 1 | 1.17 | .002 | .28 |
| Sex | 1 | 1.68 | .003 | .20 |
| Sex friends* | 1 | .04 | .000 | .83 |
| Error | 600 | (.360) | ||
| 8th Grade | ||||
| Friends | 1 | .081 | .000 | .78 |
| Sex | 1 | .062 | .000 | .80 |
| Sex friends* | 1 | 4.77* | .010 | .03 |
| Error | 600 | (.360) |
Note: Values enclosed in parentheses represent mean square errors
*
p ≤ .06
**
p ≤ .05
a
An independent samples t-test indicates girls with other-sex best friends scored higher in antisocial behavior than did girls with same-sex-only best friends, t = −2.38, p = .38; no significant differences were found for boys