Answer:
Internal validity.
Explanation:
Internal validity is the study in which trust relationship is build between treatment and outcome. This relationship is known as <em>cause-and-effect. </em>
In this type research, the studies are based on whether the finding is questionable or not. The research which can overrule the possibility of alternative explanations of our findings is internally valid.
The threats of internal valid study are:
- <u>Natural Improvement </u>
- <u>Maturation</u>
- <u>Historical Events</u>
- <u>Placebo effects</u>
- <u>Nonspecific effects</u>.
So, the correct answer is 'Internal validity'.
Answer: Variable-ratio
Explanation:
Variable ratio schedule is defined as reinforcement schedule in which a response is reinforced after uncertain or sudden number of responses.It has the ability to generate high rate of response system with unpredictable factor. Example of variable ration schedule can be gambling game etc.
According to the question,Steve is reinforced into variable ratio schedule as chances of getting reward is uncertain because reward is given for assignment after number of assignment passes without any reward by instructor.
The answer is "legitimate purpose".
<span>Among the potential components influencing survey response, three of them are the subject of the survey, who is sponsoring the survey, as seeing some credible source can enhance the respondent's willingness to answer questions, and the survey provider, are the essential determinants.
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This is the best I got: The best way to prove that slavery was in fact an inefficient market because the assumptions of Fogel and Engerman are weakly based and in some cases rather short-sighted.
