Dr. Nelson tells his psychology class that parents who are discipline inconsistently, engage in explosive discipline, provide little supervision, and are inflexible in rules and consequences. Dr. Nelson is likely lecturing on which of these models of ODD?

Preschoolers often have trouble tying their shoelaces because they have inadequate

forearm strength. fine motor skill development. coordination and balance. gross motor skill development.

A scientist, conducting a research study on sleep and learning, questions her own objectivity and decides to let a third person, not associated with conducting the experiment, score the tests. The scientist is probably trying to eliminate ______ bias

a. experimenter b. sample c. control d. treatment