Sort each of the following claims into the corresponding category of research.

As pizza consumption increases so does a person's anger level.

Correlational Research or causal research?

A group that breathed pure oxygen had
better test performance than a group that
breathed normal air.

Correlational Research or causal research?

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People who eat breakfast most days tend to
have a higher GPA.

Correlational Research or causal research?

A group that consumed more caffeine
showed less ability to focus than a group that
consumed no caffeine.

Correlational Research or causal research?

As exercise rate increases, a person's
memory increases.

Correlational Research or causal research?

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Correlational Research or causal research?

What’s the answer

As pizza consumption increases so does a person's anger level: Correlational Research

A group that breathed pure oxygen had better test performance than a group that breathed normal air: Causal Research

People who eat breakfast most days tend to have a higher GPA: Correlational Research

A group that consumed more caffeine showed less ability to focus than a group that consumed no caffeine: Causal Research

As exercise rate increases, a person's memory increases: Correlational Research

- The claim "As pizza consumption increases so does a person's anger level" can be categorized as correlational research. This type of research aims to identify relationships or associations between variables but does not determine the cause-effect relationship.

- The claim "A group that breathed pure oxygen had better test performance than a group that breathed normal air" can be categorized as causal research. This type of research aims to establish a cause-effect relationship between variables by manipulating one variable and assessing the resulting effect.

- The claim "People who eat breakfast most days tend to have a higher GPA" can be categorized as correlational research. It identifies a relationship between eating breakfast and GPA but does not establish a causal link.

- The claim "A group that consumed more caffeine showed less ability to focus than a group that consumed no caffeine" can also be classified as correlational research. It identifies a relationship between caffeine consumption and focus but does not establish causality.

- The claim "As exercise rate increases, a person's memory increases" can be categorized as correlational research. It identifies a positive relationship between exercise rate and memory performance but does not establish causality.

Therefore:
Claim 1: Correlational Research
Claim 2: Causal Research
Claim 3: Correlational Research
Claim 4: Correlational Research
Claim 5: Correlational Research