Phenylketonuria (PKU)is Linked to Low Levels of Which Chemical Messenger

question 492

Multiple Choice

Phenylketonuria (PKU) is linked to low levels of which chemical messenger in the brain?​

• A) ​dopamine
• B) ​histamine
• C) ​acetylcholine
• D) ​GABA

Differentiate between dependent, independent, situational, and confounding variables.

Comprehend the concepts of internal, external, and construct validity in relation to research methodology.

Interpret the numerical index of the strength of relationship between variables, including correlation coefficients.

Analyze the role of participant variables in research and their implications.

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Definitions:

Observational Methods

Research techniques that involve watching participants in natural or contrived situations to gather data about their behavior.

Observer Drift

A phenomenon in which there are gradual changes in the way an observer measures or perceives phenomena over time, leading to inconsistencies.

Reactivity

The change in behaviour often seen when people know they are being observed or filmed. One of the difficulties inherent in in vivo observation and analogue observational settings.

External Validity

The extent to which the results of a study can be generalized to other situations and to other people.