Based on a survey of 4113 U.S. adults, researchers at Stanford University conclu

Question

Based on a survey of 4113 U.S. adults, researchers at Stanford University concluded that Internet use leads to Increased social Isolation. The survey was conducted by an Internet-based polling company that selected its samples from a pool of 31,000 potential respondents, all of whom had been given free Internet access and WebTV hardware in exchange for agreeing to regularly participate in surveys conducted by the polling company. Two criticisms of this study are listed below. For each criticism, indicate what type of bias is being described. The first criticism was that Increased social Isolation was measured by asking respondents. If they were talking less to family and friends on the phone. selection bias measurement or response bias nonresponse bias The second criticism was that the sample was selected only from a group that was induced to participate by the offer of free Internet service, yet the results were generalized to all U.S. adults. selection bias measurement or response bias nonresponse bias

Explanation / Answer

Question

The first criticism was that increased social isolation was measured by asking respondents if they were talking less to family and friends on the phone.

Answer :

Measurements or Response bias

The second criticism was that the sample was selected only from a group that was induced to participate by the offer of free internet service, yet the result were generalized to all US adults.

Answer :

Selection Bias

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