The system of rules for combining words and phrases to make correct sentences is called ________

The infant's ability to cope with arousal or distress is termed:

A) self-regulation. B) reactivity. C) personality style. D) response threshold.

You hypothesize that lack of sleep impairs cognitive ability. In order to test your hypothesis, you will have to determine how to define and measure ‘lack of sleep' and ‘cognitive ability'. This is another way of saying that you will have to:

a. develop a research question b. develop a theory c. develop a hypothesis d. create an operational definition