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Suppose there is a high positive correlation between reading speed and reading comprehension. You suspect that IQ is a potential third variable. You complete a partial correlation procedure and, with IQ controlled statistically, the high correlation between speed and comprehension remains. What do you conclude?
Endorphins
Neurochemicals produced by the brain that act as natural painkillers and are also associated with feelings of pleasure or euphoria.
Acetylcholine
A neurotransmitter in both the peripheral and central nervous system that plays an important role in muscle activation and cognitive function.
Alzheimer's Disease
A progressive neurodegenerative disorder characterized by memory loss, cognitive decline, and personality changes.
Neurons
Specialized cells in the nervous system that transmit information through electrical and chemical signals.
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