This led him to suspect that these symptoms resulted from psychological processes.
Quick information:
Psychological processes are used during acquisition. The most basic psychological processes are sensation, perception, attention, learning, and memory.
If we collect and record the behaviors of the people which show a similar pattern and then access how many times that behavior appeared or was performed then that behavior would act as a frequency approach. And this approach shows the ratio of the occurrence of the single event to the total number of outcomes.
