Table 4. Summary of the PCA results for the pipe.

Before orthogonal rotation
Dimension	Eigenvalue	Variance explained		Variable loadings
		Individual	Cumulative	Contact latency	Persistence	Motor diversity	Approach posture	Manipulation likelihood
1	2.3801	47.6022		0.2343	0.6770	0.8871	0.1554	0.4262
2	1.3100	26.1996	73.8018	0.4153	0.0922	0.0064	0.4906	0.3055
3	0.6613	13.2266	87.0284	0.2499	0.0330	0.0275	0.2972	0.0537
4	0.5132	10.2645	97.2929	0.0985	0.1593	0.0005	0.0567	0.1983
5	0.1354	2.7071	100.0000	0.0020	0.0386	0.0785	0.0000	0.0163
After orthogonal rotation
1	2.0270	40.5395		0.0525	0.6832	0.8414	0.0062	0.4437
2	1.1986	23.9721	64.5116	0.0002	0.0032	0.0243	0.9370	0.2339
3	1.1258	22.5167	87.0284	0.8468	0.1158	0.0553	0.0001	0.1079