Table 1.
Factor loadings of the analyzed parameters for every factor extracted by factor analysis.
| VARIMAX-rotation | Rotated component matrix | ||||
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | |
| OF: distance (m) | 0.093 | 0.867 | −0.114 | −0.078 | −0.053 |
| OF: center time (s) | −0.129 | 0.011 | 0.807 | −0.083 | 0.004 |
| EPM: total arm entries | 0.059 | 0.833 | 0.026 | −0.061 | 0.083 |
| EPM: % open arm entries | 0.39 | −0.058 | 0.656 | 0.212 | −0.117 |
| FC: shock context_freezing (s) | −0.506 | −0.242 | 0.424 | 0.266 | 0.07 |
| FC: CS− freezing (s) | 0.028 | 0.089 | −0.127 | 0.08 | 0.874 |
| FC: CS+ freezing (s) | −0.42 | −0.23 | 0.324 | −0.072 | 0.515 |
| LD: % activity in light | 0.865 | −0.124 | −0.039 | −0.202 | 0.097 |
| LD: total activity (s) | 0.735 | 0.327 | 0.164 | 0.102 | −0.111 |
| SI: % time of mouse contacts | −0.034 | 0.052 | −0.038 | −0.817 | −0.285 |
| TS: time immobile (s) | −0.236 | −0.112 | 0.027 | 0.679 | −0.365 |
The first factor is represented by context freezing and post-conditioning activity- and anxiety measures. Pre-conditioning activity and anxiety were shown to be independent from each other (factors 2 and 3). Social interaction and depression measures loaded on the same factor (factor 4). Cue-related fear memory displayed high correlations to the fifth factor. Factor loadings above 0.5 are considered high loadings and highlighted in bold. Extraction Method: Principal Component Analysis. Rotation Method: Varimax with Kaiser Normalization, rotation converged in 8 iterations.