A researcher suggests that the effect of the testing condition on the affiliation ratings is caused by increased sympathetic nervous system activity due to performing a repetitive behavior. Is this explanation likely to be supported?

No, both the conditions are synchronous and asynchronous. but when this procedure occurred, both the process ratings were different. If it caused due to an increased in the sympathetic nervous system then both the groups have the same ratings.

Sympathetic nervous system always do the activation which is even called fight or flight situation. It is the part of PNS. It is activate at basic level to maintain the homeostasis. It is antagonist of SNS. SNS neuron generally developed nearby spinal cord.