Answer: Valid
Explanation: There are two types of trials in Posner's attention experiments: valid and invalid. The first one is when a cue indicates exactly where the target would be appearing, meanwhile the invalid trial is when the cue indicate an erratic position of the target to be presented.
The Sahara Desert because of it's very large size, high temperatures, and scarcity of water.
Answer:
Effect.(Thorndike's law of effect).
Explanation:
Thorndike's principle that behaviors followed by favorable consequences become more likely, and that behaviors followed by unfavorable consequences become less likely.
They are explained further as those behavioral responses that were most closely followed by a satisfying result were most likely to become established patterns and to occur again in response to the same stimulus.
