Test/essay measure | A) Loadings on the first five factors extracted by PCA, varimax rotation | B) Loadings on the first five factors extracted by PCA, varimax rotation, after correction for strain effects: residuals | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
 | Factor 1 | Factor 2 | Factor 3 | Factor 4 | Factor 5 | Factor 1 | Factor 2 | Factor 3 | Factor 4 | Factor 5 |
open field | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   Time in corners (mean 5 days) |  |  |  | 0.73 | -0.50 |  |  |  | -0.78 |  |
   Line crossings (mean 5 days) | -0.92 |  |  |  |  | -0.87 |  |  |  |  |
   Rearings (mean 5 days) | -0.91 |  |  |  |  | -0.90 |  |  |  |  |
elevated plus maze | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   Percent time open arms (day 1) |  |  |  |  | 0.86 |  |  |  | 0.83 |  |
   Percent entries open arms (day 1) |  |  |  |  | 0.89 |  |  |  | 0.87 |  |
   Rearings (day 1) | -0.69 |  |  |  |  | -0.64 |  |  |  |  |
circular Light-dark box | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   Time in dark (mean 3 days) |  | -0.56 |  | 0.59 |  |  |  | 0.68 |  |  |
   Line crossings (mean 3 days) |  |  |  | -0.62 |  |  |  | -0.71 |  |  |
   Rearings (mean 3 days) | -0.50 |  |  | -0.67 |  | -0.63 |  | -0.67 |  |  |
standard MWM | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   Distance swum (mean 5 days) | 0.64 |  |  |  |  | 0.72 |  |  |  |  |
   Distance swum (linear trend) |  |  | 0.79 |  |  |  | 0.62 |  |  |  |
   Probe trial time training annulus |  |  | -0.74 |  |  |  |  |  |  | -0.55 |
repeated acquisition MWM | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   Delta (odd minus even trials) | -0.51 |  |  |  |  |  |  |  |  | 0.75 |
passive avoidance | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   Log latency entry dark, retention |  |  | -0.57 |  |  |  | -0.60 |  |  |  |
serotonin | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   5-HT turnover in hippocampus | -0.51 |  |  |  |  |  |  |  |  |  |
   5-HT cortex |  | 0.90 |  |  |  |  | -0.81 |  |  |  |
   5-HIAA cortex |  | 0.85 |  |  |  |  | -0.75 |  |  |  |
Variance explained (%) | 32.0 | 12.3 | 11.5 | 9.0 | 8.0 | 24.4 | 15.1 | 12.4 | 10.0 | 8.1 |