Paul Ekman and his colleagues gathered evidence supporting the universality of _________ facial expressions of emotion

Regarding psi phenomena, which of the following statements is TRUE?

a. Psi phenomena are studied within the discipline of psychodynamic psychology. b. Psi phenomena include the scientific study of thresholds and subliminal stimulation. c. Psi phenomena lie outside the realm of normal experience and are difficult to study scientifically. d. Psi phenomena include stroboscopic movement, illusions, and hallucinations.

Why do researchers believe that the reciprocation norm operates on the need to restore balance and not necessarily because of our selfish desire to receive recognition for our acts?

a. Because research supports the idea that we do not like to receive recognition for our acts of kindness. b. Because people only seem to reciprocate when the other individual is aware of the favor. c. Because research supports the idea that humans are not selfish. d. Because people seem to reciprocate even when the other individual will not know they returned the favor.