100 
Psyche 
[March 
variables were necessarily independent. Underlined transitions in 
Table I indicate those behaviors linked to one another which de- 
parted significantly (p <0.01) from the null order model. Negative 
linkages are marked (-), indicating that certain behaviors occurred 
less frequently than expected by chance. 
Results 
Transitional Probabilities 
A total of 3,525 adult male-male agonistic interactions were re- 
corded in the laboratory that included 14,109 behavioral acts. The 
original 20 agonistic behaviors were found to be better represented 
by 16 behavior categories, and the rationale for this consolidation 
is discussed in Aspey ( 1 976b). When the data were cast into a 1 6 X 1 6 
matrix, the occurrence of significant deviations from expected fre- 
quencies suggested a probabilistic structure to the intra-individual 
agonistic behavior sequences (Table I). Of 256 possible linkages 
from a 16 X 16 matrix, 37 occurred more frequently than expected 
by chance, while 30 occurred less frequently. With regard to only 
the foreleg movements and postures exhibited during agonistic 
interactions (Aspey, 1976b), a wider variety of subsequent behaviors 
occurred during intra-individual sequences than during inter-indi- 
vidual behavioral responses. For example, during intra-indi- 
vidual sequences, an average of 5.6 different agonistic behaviors 
followed a given foreleg movement or posture beyond chance 
levels, while only 2.6 different behaviors followed a given foreleg 
movement or posture during inter-individual encounters (Aspey, 
1976b). 
Sequential Behaviors of Dominant and Subordinate Spiders 
Since adult S. crassipes could be characterized as Dominant or 
Subordinate on the basis of the kinds and frequencies of agonistic 
behaviors exhibited during male-male interactions (Aspey, 1975b, 
1976b), profiles of Dominant and Subordinate spiders were con- 
structed using intra-individual behavior sequences. Although the 
original dominance classifications of the spiders utilized responses 
from one spider toward another, this method of characterizing 
Dominant and Subordinate spiders emphasized behavioral se- 
quences exhibited by individual spiders. 
