Approximately how many babies have been born through in vitro fertilization (IVF)?

Suppose you conduct an experiment to study the effects of love on improving children's

self-concept. To manipulate the variable of love, you arrange for a research assistant to hug each child after they have successfully completed a set of math problems. When the session is over, you ask the children if they felt loved during the study. They all say no. Apparently, your operational definition of the independent variable is a. unreliable. b. not operational. c. too subjective. d. uninterpretable. e. not objective.

The psychoanalytic patient who lets his thoughts flow without interruption or inhibition is using ______

a. catharsis c. positive transference b. regression d. free association