Answer:
The answer is difference threshold.
Explanation:
Also called just-noticeable difference or least perceptible difference, the difference threshold is the degree of a stimulus that must be changed in order to be recognised.
For it to be considered a difference threshold, the difference must be identified at least 50% of the time.
Answer:
July 2001, In Lusaka, Zambia
Explanation:
Answer:
The company is using callbacks.
Explanation:
Callbacks are a survey technique particular of surveys carried out by phone. They are very common in this kind of survey because less than half of the interviews take place during the first call, whether for respondent's unavainability at the time of the survey, or low interest for completing the survey at that time. Maybe the person in question prefers to be interviewed in the future.
Experimental. Dr James used an experimental model of research for his study which involved facial symmetry. Experimental studies basically comprise of an independent and dependent variable. The goal is to observe if the independent variable has an effect on the dependent variable, and if it has how strong and where is it heading? This is how an experimental study is performed.
