A researcher is interested in understanding which interview techniques increase the amount of accurate details provided by an eyewitness about a crime. Specifically, they want to investigate the effectiveness of the Standard Police Interview (SPI), Structured Interview (SI), or Modified Cognitive Interview (MCI). Participants watched a video of a mock crime and were interviewed using one interview technique (SPI, SI, or MCI). The number of accurate, forensically relevant details were recorded. Demographic information was also collected.The data set for Q1-Q13 has been adapted from the data from that project.

Perform and Interpret a One-Way ANOVA (8 points total)

Is there a significant difference in the number of accurate details based on interview technique (MCI, SI, or SPI)?

Q1. What is the null hypothesis? (1)

Q2. What are the DV and IV? (1)

A researcher is interested in understanding how jurors respond to seeing gruesome photographs. The researcher wants to know if seeing more photographs increases participants' physiological arousal. Participants were hooked up to a machine that measures their skin conductance response (SCR). All participants read a description of a violent crime. Then, participants were shown 20 gruesome photographs of the crime. Conductance was measured after 1 photograph (Photo1), 5 photographs (Photo5), and 20 photographs (Photo20).

Q14. What is the null hypothesis? (1)

Q15. What are the DV and IV? (1)