In the first experiment, the effects of gender and age of subjects on perception were investigated with three groups of 12 subjects, i.e., young males, young females and old males.
The concept of "body language" refers to the collective expressions, which use the physical body as the main subject of human perception, nonverbal expression, and communication (cf., Merleau-Ponty 1945, In: Silverman, 1976; Fran 1988).
For if there is nothing to the mind but a collection of perceptions, then there is no self that perdures as the subject of these perceptions.
Therefore, it does not make sense to speak of the subject of certain perceptions yesterday as the same self, or the same person, as the subject of certain perceptions today or in the future.
A custom made psychophysical test assessed subjects' subjective perception of tones between 30db and 90 db using 1 10 point likert scale (1 – cannot hear anything, 10 very loud).
Vividness of Imagery Scale (Lotze et al., 2001 ): to measure the vividness of each subject's perception of their ability to move the phantom limb, where 0 = no perception of any voluntary movement to 6 = very vivid perception of voluntary phantom movement.
This body subject is my center of perception and field of action.
A self-assessment questionnaire was filled in on day 14 (week 2), day 28 (week 4), and day 84 (week 12) to document the subjects' own subjective perception of product efficacy.
Using psychological tricks and carefully choreographed shifts in intensity, she has also devised ways of heightening a subject's perception of pain.
However, there is often a dichotomy between the behaviors of others and a subject's perception of those behaviors.
