The answer is: [D]: lack of motivation .
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The other answer choices: (hallucinations, delusions, word salad) are examples of positive symptoms of schizophrenia.
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the most serious flaw of this design is: <span>They have not defined happiness or how it will be measured.
Happiness is very subjective because it each person may have a different source of happiness. For some people, it maybe the success of their career while for the other it's simply doing what they love to do. Not only that, if Magali and Jane collect the data simply by asking like that, they would not know whether the person is telling the truth.</span>
A-B-A-B design could provide the most valid non intervention measure with demonstration of experimental control.
In statistics, the experimental design, also known as the design of experiment (DOE), is described as the layout of an information-gathering experiment in which a variation may or may not be present. Typically, controlled experiments use this phrase. In order to make the results more reliable, these tests minimize the impacts of the variable. In this design, a group of people, plants, animals, etc. may participate in an experimental unit's procedure.
Pre-experimental research designs are the most straightforward kind of experimental research designs in statistics. Following the identification of some factors as causes and effects, a group or groups are kept under observation in this method. Typically, this approach is used to determine whether the targeted group need additional research. This is the reason why this procedure is regarded as being economical.
Learn more about experimental control here
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The correct answer to this open question is the following.
The adage most appropriate to memory function and aging is "use or lose it."
That is why it is so important to continually exercise the memory function so the brain never loses its ability to do something previously learned. You use it and you practice it so you master. Mastery is the result of constant repetition. So it is better to use something to be fresh in the memory and could be used when needing it.
