A researcher would like to determine the effect of caffeine on memory. Participants are randomly assigned to receive a caffeine pill or a sugar pill. Both groups complete a recall task that assesses their memory. However, even those who received the sugar pill had a small increase in memory. This is likely due to: a. The placebo effect b. The correlational approach to the study c. The participants becoming smarter d. The experimental effect

The placebo effect

Explanation:

The placebo effect in psychology refers to a situation in which participants in a research receive beneficial effects due to the administration of an inactive substance or a sham treatment. The positive beneficial effect received can then be attributed purely to believe and not to the treatment itself. A placebo treatment could produce a real healing effect like a true medical or psychological treatment.

The participants who received the sugar believed it to be a memory enhancing treatment hence the slight increase in memory capacity due to placebo effect.

a and b

answer: after carbon dioxide enters the leaf through stomata it moves into the mesophyll cells where photosynthesis occurs and glucose is constructed. respiration occurs when glucose (sugar produced during photosynthesis) combines with oxygen to produce useable cellular energy.

explanation: