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Researchers conducted an experiment to study the effects of sleep training on sleep duration and quality. They randomly assigned some participants to a treatment condition where they received eight sessions of sleep enhancement training and some participants to a control condition where they did not receive the training. If the participants who received sleep enhancement training had better sleep duration and quality than the people who did not receive the training, then the researcher can conclude that the training works. What advantage of experimental research does this demonstrate?

How do the chromosomes contained in a gamete differ from the chromosomes contained in other normal human cells?

In the diagram, which letter label indicates an epicenter?

A therapist, whose approach to psychotherapy is based on Sigmund Freud’s theory, explains that a patient’s problematic behavior is based on ________.

Grains formed by weathering and erosion are re-formed into a sedimentary rock with which texture?

A store clerk witnesses the following exchange that she has seen numerous times between a parent and child who are regular customers. A child asks for a toy. The parent refuses to get it. The child throws a temper tantrum. The parent puts the toy in the shopping basket. The child stops crying. The store clerk thinks, “Behavior is controlled by its consequences,” and is referring to ________.

Which of the following is true about complications that can be experienced during pregnancy?

Broadly, metamorphism involves the

18-month old Jamie sees his mother eat kale, while he enjoys graham crackers. Jamie’s mother expresses how much she loves kale. When presented with the opportunity to give his mother either some of his graham crackers or some of the kale she likes, which will Jamie give his mother, and why?

A(n)________ approach to development has been criticized for equating the mind to a computer and for not taking into account the social context in which development takes place.