R

According to Jean Piaget, the duration of mental development which starts with the preoperational stage and concludes with the concrete operational stage.

Incomplete sexual or asexual reproduction; a failure to produce viable offspring.

Psychologist trained in nonclinical aspects of the psychology of human mobility relative to sports. Main focus is the study of efficacy of applied...

In Henning's Odor Prism, one of the six primary odor qualities.

Respiratory disorder occurring in newborn infants wherein the lungs fail to inflate properly because of a lack of natural surfactant which protects alveoli from...

Arrangement of responses in the order in which they are anticipated to be elicited by a particular stimulus, or deemed likely to occur in...

Psychological philosophy which highlights responses as the main objective of primary study. See also: act psychology; S-R psychology.

Subdued spectrum or force of emotional expression. See also: flat affect.

Light sensitive layer of the eye, consisting of four major layers including the outer neural layer which contains nerve cells and blood vessels, the...

Affecting premature infants, a disorder of the retina which may cause total retinal detachment and blindness.