In an Experiment, Control Over Extraneous Variables, Such as the Time

question 500

Multiple Choice

In an experiment, control over extraneous variables, such as the time of day or the temperature of the room, can be obtained by

• A)using a double-blind experiment.
• B)making all conditions except the independent variable exactly the same for all subjects.
• C)using repeated measures.
• D)observing and recording the impact of each variable on each subject in the experiment.

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Definitions:

Neurotransmitters

Chemicals in the nervous system that transmit signals across a synapse from one neuron to another.

Action Potentials

Rapid and temporary electrical changes in a neuron's membrane potential that allow nerve cells to communicate.

Hormones

Chemical substances produced in the body that regulate and control the activity of certain cells or organs, crucial for many bodily functions.

Myelin

A fatty substance that surrounds and insulates the axons of some neurons, facilitating faster electrical impulse transmission.