Thesis statement: Using the Internet gives young adults increased literacy but also leads to health problems and isolation from other people.

Evidence: “The problem of feeling estranged from society is much more severe among young people who spend more than four hours a day online,” states Martha De Priau, a psychologist at Vanderbilt University.

Is this evidence effective/ineffective?

Question

Thesis statement: Using the Internet gives young adults increased literacy but also leads to health problems and isolation from other people.

Evidence: “The problem of feeling estranged from society is much more severe among young people who spend more than four hours a day online,” states Martha De Priau, a psychologist at Vanderbilt University.

Is this evidence effective/ineffective?

BlackTom AI · Accepted Answer

Credible, relevant expert testimony supports the claim that heavy Internet use causes social isolation, so this evidence is effective.

1) Relevant knowledge points and concepts
- Thesis components: the claim includes increased literacy and negative outcomes (health problems and isolation). Good evidence must be relevant, credible, specific, and authoritative.
- Types of evidence: expert testimony (a named psychologist at a reputable university) is considered strong support when it directly addresses the claim.
- Relevance and sufficiency: evidence should directly back a specific part of the thesis and ideally include quantification or study-based findings.

2) Step-by-step reasoning
- Identify what the quote says: Martha De Priau, a psychologist at Vanderbilt University, states: “The problem of feeling estranged from society is much more severe among young people who spend more than four hours a day online.”
- Map the quote to the thesis: the thesis asserts that Internet use leads to health problems and isolation. The quote explicitly links heavy online time (>4 hours/day) to feeling estranged from society — a clear form of social isolation.
- Evaluate authority: the speaker is a psychologist affiliated with a respected university, which establishes credibility for a claim about social/mental health.
- Assess specificity: the quote gives a threshold (>4 hours/day) and characterizes the effect as “much more severe,” which is more informative than a vague claim.
- Consider limitations: the quote addresses isolation specifically (one negative outcome) rather than literacy or every health problem, but it directly supports the isolation portion of the thesis.

3) Calculations/intermediate steps
- Not applicable; no numeric computation beyond the quoted threshold (>4 hours/day).

4) Why the correct answer is correct
- The evidence directly and authoritatively supports a key negative consequence asserted in the thesis (social isolation). It is specific and attributable to an expert, making it effective evidence for that thesis component.

5) Why the other option is incorrect
- Labeling it “Ineffective” would ignore the direct relevance, expert source, and specificity of the claim. While the quote could be strengthened with study details, that does not make it ineffective.

Conclusion: The evidence is effective, which matches the provided answer.

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