To increase confidence that a sample is representative of the population, researchers utilize which of the following approaches to select the sample?

An athletic team almost always wins the game when they play at "home" but they seldom win a game played "on the road.". Their winning appears to be influenced by where the game is played. This illustrates the operant principle of

a. shaping. b. punishment. c. extinction. d. stimulus control.

In 1950, there were ____ patients in mental hospitals. In 1970, there were ____ patients in mental hospitals

a. 1,000,000; 555,000 c. 550,000; 150,000 b. 555,000; 750,000 d. 100,000; 5,000

The ___ is a neuron in the visual cortex that responds best to a line or an edge with a particular orientation at a specific place on the retina

a. simple cell b. complex cell c. ganglion cell d. hypercomplex cell

Piaget based the six substages of sensorimotor development on ________

A) interviews with parents and children B) observations of a large sample of young children C) observations of his own three children D) field experiments with toddlers and preschoolers