Dr. rhodes is interested in how differing levels of light affect how people perceive color. he finds participants for this research study by making an announcement in several psychology classes at his university. what kind of sampling method is dr. rhodes using?
(a) snowball sampling
(b) systematic sampling
(c) convenience sampling
(d) cluster sampling

Atreatment for stuttering in which the person is asked to speak in a singsong fashion, usually with the aid of a metronome is

In the kingdom of saudi arabia the government controls every aspect of oil production which makes up the majority of the country's economy. while other businesses are owned by individuals, the biggest segment of saudi arabia's economy is oil production. saudi arabia's economy would best be described as a) entirely market. b) almost entirely command. c) a mixture between just market and traditional. d) a mixed economy with large amounts of command.

Which of the following is an example of proximodistal pattern of growth? (a) abbey learning to sit first before learning to stand or crawl (b) alex learning to move his eyes before learning his first words (c) colin learning to stare at moving objects before trying to touch them with his hands (d) polly learning to grab the objects with her whole hands before learning to pick them up with her fingers