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Exercise 4e

Exercise 4e

Q Before starting this assignment, refresh your memory of Chapter 6 and Chapter 8. Read the attached article by Tremblay and his colleagues (2004) and evaluate its sampling and measures. Notice that this is one of the shortest articles I could find - I want to avoid overwhelming you with long readings. Apply the guidelines from Chapters 6 and 8 (listed below) and rate each one of them on the scale of 1 to 5 (or N/A – not applicable, or I/I – insufficient information). Briefly explain each of your ratings. Chapter 6 guidelines ____ 1. Was random sampling used? ____ 2. If random sampling was used, was it stratified? ____ 3. If some potential participants refused to participate, was the rate of participation reasonably high? ____ 4. If the response rate was low, did the researcher make multiple attempts to contact potential participants? ____5. Is there reason to believe that the participants and nonparticipants are similar on relevant variables? ____ 6. If a sample is not random, was it at least drawn from the target group for the generalization? ____ 7. If a sample is not random, was it drawn from diverse sources? ____ 8. If a sample is not random, does the researcher explicitly discuss this limitation and how it may have affected the generalizability of the study findings? ____ 9. Has the author described relevant characteristics (demographics) of the sample? ____ 10. Is the overall size of the sample adequate? ____ 11. Is the number of participants in each subgroup sufficiently large? ____ 12. Has informed consent been obtained? ____ 13. Has the study been approved by an ethics review board (Institutional Review Board (IRB) if in the United States or a similar agency if in another country)? ____ 14. Overall, is the sample appropriate for generalizing? Chapter 8 guidelines ____ 1. Have the actual items and questions (or at least a sample of them) been provided? ____ 2. Are any specialized response formats, settings, and/or restrictions described in detail? ____ 3. When appropriate, were multiple methods used to collect data/information on key variables? ____ 4. For published measures, have sources been cited where additional information can be obtained? ____ 5. When delving into sensitive matters, is there reason to believe that accurate data were obtained? ____ 6. Have steps been taken to keep the measures from influencing any overt behaviors that were observed? ____ 7. If the collection and coding of observations involves subjectivity, is there evidence of inter-rater (or inter-observer) reliability? ____ 8. If a measure is designed to measure a single unitary trait, does it have adequate internal consistency? ____ 9. For stable traits, is there evidence of temporal stability? ____ 10. When appropriate, is there evidence of content validity? ____ 11. When appropriate, is there evidence of empirical validity? ____ 12. Do the researchers discuss obvious limitations of their measures? ____ 13. Overall, are the measures adequate? Attachments o Tremblay et al., 2004 (trajectories of aggression during childhood).pdf

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Chapter 6 guidelines are rated 3/5. For instance, a random sample population consisted of 572 families and a newborn aged five months old. The sample was graded using a semi-parametric mixture model for distinction and logit analysis of regression for identifying and predicting. Despite some participants refusing to participate, the study possibly had more participants in terms of parents, and they were interviewed appropriately according to the research (Tremblay et al., 2004). Also, the researcher’s physical aggression was used, and he asked both parents to conclude a questionnaire through an interview, thus obtaining the targeted data.