In men, the most common age of onset for schizophrenia is between______

Thirteen-month-old Clara uses the word "babydoll" to refer to only her doll, and not to other dolls. Clara is making a(n) ____________ error

a. overextension c. referential style b. underextension d. expressive style

________ is a type of evaluation that asks whether the IV was the only possible reason for

changes in the DV, whereas ________ asks whether the results of your study apply to populations and situations different from your study. A) Internal validity; factorial validity B) Internal validity; external validity C) Factorial validity; internal validity D) External validity; internal validity