Astudent tested the hypothesis that ice melts more slowly in a glass tumbler than it does in a plastic or paper cup. study the data, and then answer the questions that follow. the question from this statement is. list all the variables you can find in this experiment.

Agroup of student volunteers participates in a study designed to assess several behavioral interventions for improving output in a repetitive task. prior to the beginning of the study, all volunteers unknowingly observed, and their output is measured. at the beginning of the study, prior to any intervention, the volunteers perform the same task under the observation of a study administrator, and their overall output increases. which of the following terms describes this phenomenon? a. simpson's paradox b. hawthorne effect are d. novelty effect d. pygmalion effect e. observer-expectancy effect