64 
Psyche 
[March 
The meaning of these data is believed to be, essentially, 
that the response pattern increased in aggressiveness as 
the summer advanced, and subsequently regressed with the 
coming of autumn. This is directly represented in the pro- 
gressive decrease of shufflings, with increase of seizings 
until the autumn. The Teachings show similar increases 
followed by decrease. In the spreadings, the first increase 
represents a stage in the maturing of the attack pattern ; the 
second increase was similarly a phase of regression in the 
attack pattern. The large proportion of “imperceptibles” 
during the final period will be noted. 
Repetition of stimulus. If the spider has once shuttled, 
she normally, if undisturbed, returns of herself to the orig- 
inal position after an interval of seconds or minutes (see 
below, 1936 data). If the fork-to-dorsum stimulus be ap- 
plied to the spider in the changed position, she normally 
shuttles back, and this process can be repeated to various 
extents. Only quite limited trials of this nature were made 
in 1935, but numbers of shuttling repetitions actually 
observed were, 
times shuttled 2-3-4-5-6-*-20 
times observed 9-3-0-1-1-4- 1 
(*denotes designation in field notes as “repeatedly”.) 
The extreme case (8-17-35) was otherwise distinguished. 
A mature individual, she had been remarked on several pre- 
vious occasions for an exceptional tendency to drop to the 
ground when approached, which had made tuning fork ob- 
servation difficult. In this respect and in the shuttling, she 
was presenting an immature, regressive type of behavior, 
at a somatic age when more aggressive patterns were char- 
acteristic of her neighbors. When various individuals are 
observed repeatedly, as in these studies, one comes to recog- 
nize distinctive “personalities” in certain of them, some- 
times regressive as here, sometimes peculiarly aggressive 
(cf. 1936 data, below). 
Accessory responses. The above individual in the last five 
trials preceded the shuttling with a slight spreading. In 
only two instances, in other individuals, was extinction of 
