Answer:
practice effects
Explanation:
Based on the information provided within the question with regards to Leigh's experiment it can be said that her biggest concern should be practice effects. This term refers to the effects or changes that can occur when repeating the same experiment various times with the same participants. Which is what Leigh is doing, as she is only changing one variable but repeating the same experiment.
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- Physical environment can influence intellectual grwoth by providing good quality nutrition for human's development
- Social environment can influence growth by shaping behaviors through culture. For example, in East Asia, every kids experience cultural pressure to get high scores in school or they will be shamed, therefore Students from these social groups tend study harder compared to our students
