The Main Difference Between Internal Validity and External Validity Is

question 151

Multiple Choice

The main difference between internal validity and external validity is that:

• A) external validity concerns the degree to which the experiment supports clear causal conclusions, while internal validity concerns the generalizability of the results.
• B) internal validity concerns the degree to which an experiment supports clear causal conclusions, while external validity concerns the generalizability of the results.
• C) internal validity is based on dependent variables, while external validity is based on independent variables.
• D) internal validity is based on independent variables, while external validity is based on dependent variables.

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Definitions:

Phosphate

A chemical compound that contains the phosphate ion (PO4^3-), which is essential in biological systems for energy transfer and storage.

Intracellular Buffer System

Mechanisms within cells that regulate pH levels, preventing significant variations that could otherwise interfere with cellular function.

Sodium-Potassium Pump

A cellular mechanism that moves sodium ions out of and potassium ions into a cell against their concentration gradients, essential for cellular functions.

Carbonic Acid/Bicarbonate System

A major buffer system in the blood, maintaining the body's pH balance by regulating carbon dioxide (CO2) and bicarbonate (HCO3-) levels.