The impact of investing in the good interviewers policy of practice (IGIpop) on police interviews with children

It is important to elicit the best evidence from children during investigative interviews. Many of recent improvements (such as extensive training) are costly to implement preventing police forces with small budgets from adopting them. A policy is needed that can benefit all forces irrespective of their financial resources. We assessed a new approach: Investing in the Good Interviewers: Policy of Practice (IGIpop). IGIpop suggests that all interviews should be conducted using 'good' interviewers. In 2016 we evaluated the performance of interviewers in a police force and identified the good interviewers. IGIpop was implemented in 2017 when five good interviewers were chosen to conduct all of the interviews with children alleging sexual abuse. We analysed 102 interviews and assessed how IGIpop impacted the quality of interviews. As expected, appropriate interviewing approaches increased and inappropriate interviewing approaches decreased after IGIpop. IGIpop achieved an important improvement in the quality of interviews with no additional training or costs.