Greg is a diagnostics psychologist sometimes Greg makes a mistake and identifies it perfectly healthy sample as having signs of cancer in signal detection theory this type of mistake would be known as false alarm miss correct rejection
Added by -Ngeles D.
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g., actual presence of a condition) and noise (e.g., absence of the condition). Show more…
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Which of the following is an example of a false positive? Sending an innocent man to jail. Sending a guilty man to jail. A medical test coming back negative for a disease you don't have. A medical test coming back positive for a disease you do have.
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Researchers at the University of Washington and Harvard University analyzed records of breast cancer screening and diagnostic evaluations ("Mammogram Cancer Scares More Frequent than Thought," USA Today, April 16,1998 ). Discussing the benefits and downsides of the screening process, the article states that, although the rate of false-positives is higher than previously thought, if radiologists were less aggressive in following up on suspicious tests, the rate of false-positives would fall but the rate of missed cancers would rise. Suppose that such a screening test is used to decide between a null hypothesis of $H_{0}$ ' no cancer is present and an alternative hypothesis of $H_{\mathrm{d}}$. cancer is present. (Although these are not hypotheses about a population characteristic, this exercise illustrates the definitions of Type 1 and Type Il errors.) (Hint: See Example $10.6 .)$ a. Would a false-positive (thinking that cancer is present when in fact it is not) be a Type $I$ error on a Type II error? b. Describe a Type 1 error in the context of this problem, and discuss the possible consequences of making a Type I error. c. Describe a Type II error in the context of this problem, and discuss the possible consequences of making a Type Il error. d. What aspect of the relationship between the probability of Type 1 and Type II errors is being described by the statement in the article that if radiologists were less aggressive in following up on suspicious tests, the rate of false-positives would fall but the rate of missed cancers would rise?
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Determine which subtype of schizophrenia is described in each scenario. Greg's cognitive skills and affect are relatively intact. He, however, often has delusions and hallucinations that convince him enemies are out to persecute him. ________
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