Table 3. Linear regressions of measures of prodromal psychotic SIPS/SOPS symptoms.
| Step 1 (df = 1,100) | Step 2 (df = 1,99) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| T1 Positive schizotypy | T1 Negative schizotypy | T1 Pos X Neg Schizotypy | |||||||
| Criterion T3 | β | ΔR 2 | f 2 | β | ΔR 2 | f 2 | β | ΔR 2 | f 2 |
|
SIPS/SOPS |
|||||||||
| Positive | .251* | .063 | .07 | .173 | .030 | .03 | .233 | .052 | .06 |
| Negative | .195 | .038 | .04 | .287** | .082 | .09 | .076 | .006 | .01 |
| Disorganized | .167 | .028 | .03 | .128 | .016 | .02 | .133 | .017 | .02 |
| General | .262* | .068 | .07 | .105 | .011 | .01 | .171 | .028 | .03 |
| Total | .273* | .074 | .09 | .232** | .054 | .06 | .186 | .033 | .04 |
*p<0.05
**p<0.01
***p<0.001.
Note 1: A series of linear regressions were computed to examine the variance accounted for by positive and negative schizotypy (T1) in predicting SIPS/SOPS prodromal symptoms and states at T3; maximum likelihood estimation and bootstrap procedures (with 2 000 samples) were employed.
Note 2: According to Cohen [44], f 2 values above .15 are medium and above .35 are large effect sizes.