__________ refer to an organism's reproductive cells. In human beings, they are a sperm and ovum

According to the chapter They Don't Look the Same to Meabout homogeneity and heterogeneity biases,

participants were assigned to the distractor-present and distractor-absent conditions _____________, making the research method a ______________. (a) randomly; experiment (b) randomly; quasi experiment (c) on an opportunity basis; experiment (d) randomly; correlational study

By using _________________, researchers can maximize the likelihood of a representative sample

a. very few individuals from a larger group b. random selection from a larger group c. case studies d. participant observation