Changes in Hippocampal Volume Related to Spatial Memory Abilities in Humans

question 22

Multiple Choice

Changes in hippocampal volume related to spatial memory abilities in humans and birds alike may depend on:

• A) increases in blood vessel density.
• B) the birth of new neurons.
• C) the birth of new astrocytes.
• D) the death of old neurons.

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Definitions:

Independent Variable

A variable in an experiment that is manipulated to observe its effect on a dependent variable.

Difference Between Levels

The quantitative or qualitative disparity observed between distinct stages or conditions in a variable.

Main Effect

The overall impact of an independent variable on a dependent variable in a factorial design, disregarding interactions.

Rule Of 72

A simple formula used to estimate the number of years required to double the invested money at a given annual rate of return, by dividing 72 by the expected rate of interest.