Which of the following effects occurs in a complex design when the effect of one independent variable differs depending on the level of a second independent variable?

Once an infant becomes responsive to other people and to objects and touches and moves them, she is engaging in

reflexive circular reactions. secondary circular reactions. tertiary circular reactions. adaptive reactions.

Rejecting H0with a tind and a two-tailed test _____

a. does not necessarily provide support for a research hypothesis in an experiment b. provides direct support for a research hypothesis in an experiment c. can only occur if?equals .01 d. is always a Type II error