Why are plants considered sinks for carbon dioxide?

Which psychological treatment for substance use disorders focuses on reinforcing and rewarding behaviors that are inconsistent with drug/alcohol use, going as far as providing prizes for desired behaviors?

Multinational studies on the role of gender in psychopathology have shown that _____.

Young foals who are still nursing are sometimes held off feed for _________________ hours before surgery.

When you are reading a research article, and the author concludes that the findings were “statistically significant,” it means that the results  

I am writing a self-esteem measure. I want to make sure my items on the measure correlate with one another in order to strengthen the measures

Which of the following animals barely sleeps at all (an average of less than 5 minutes a day)?

What contributes to publication bias?

______________ was in charge of a large asylum in Paris, and while this person advocated for more humane treatment for people in asylums, only ___________ tended to be treated more humanely.

Which of the following is a critique of findings from meta-analyses?