On Average,there Is a Decline in Cognitive Abilities with Old

question 83

Multiple Choice

On average,there is a decline in cognitive abilities with old age.What must be taken into account in order to understand this average decline

• A) Results may be due to age-related bias in assessment methods. 
• B) Results are confounded by the effects of experimenter expectancy. 
• C) The distribution may be skewed by a small minority of severely impaired individuals. 
• D) These results are found only within North American populations.

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Definitions:

DNA

Deoxyribonucleic acid, the molecule that contains the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms and many viruses.

Biomarker

Biological molecules found in blood, other body fluids, or tissues that are a sign of a normal or abnormal process, or of a condition or disease.

Alzheimer's Disease

A progressive neurological disorder that causes the brain to shrink and brain cells to die, resulting in severe memory loss and cognitive decline.

Creutzfeldt-Jakob Disease

An uncommon, progressive, always lethal brain disease that impacts roughly one out of every million individuals annually.