The relationship between academic achievement and job performance has been debated for years. Many employers use academic achievement to assess job candidates. But how effective is this really? A recent meta-analysis provides new insight into this issue.
The research I found via Dan Willingham, conducted by Van Iddekinge and colleagues, analyzed data from over 100 studies and found a clear but somewhat modest relationship between academic achievement and job performance. The average adjusted correlation was .21, suggesting that academic achievement is somewhat predictive of success in the workplace. The relationship was stronger for specific contexts, such as training performance (.34) and jobs closely matching one’s educational background. This shows that the relevance of academic achievement is highly contextual.
Interestingly, certain factors influence this relationship. Grades earned in subjects directly relevant to a future job, such as practice-based courses, had a higher predictive value. Teacher ratings also proved to be more reliable than central test results because they capture a broader range of skills, such as work ethic and social skills. This highlights that it is not just what you learn that matters but also how you are assessed.
Despite these findings, the link between academic and job performance remains relatively limited. Factors such as teamwork, creativity and adaptability – essential in many modern jobs – are rarely captured in school grades. In addition, trends such as grade inflation, where increasingly higher grades are awarded for the same work, mean that academic performance is becoming less and less distinctive.
This meta-analysis offers an important message for organisations: look at academic performance but do not use it as the sole measure of success. Combine it with other selection criteria, such as work experience and soft skills. This research emphasises the importance of practical experience and developing a wide range of skills for students.
Academic performance is, therefore, not the holy grail, but it can be a helpful tool – at least if you apply it correctly.
Abstract of the study:
Many organisations assess job applicants’ academic performance (AP) when making selection decisions. However, researchers and practitioners recently have suggested that AP is not as relevant to work behavior as it used to be due to factors such as grade inflation and increased differences between academic and work contexts. The present meta-analysis examines whether, and under what conditions, AP is a useful predictor of work behavior. Mean correlations (corrected for error in the criterion) between AP and outcomes were .21 for job performance (k = 114), .34 for training performance (k = 8), and −.02 for turnover (k = 20). There was considerable heterogeneity in validity estimates for job performance (80% credibility interval [.04, .37]). Moderator analyzes revealed that AP is a better predictor of performance (a) for AP measures that are more relevant to students’ future jobs, (b) for professor ratings of AP than for grades and class rank, (c) for samples that include applicants from the same university or from the same major, and (d) for official records of AP than for applicant self-reports. Job relevance was the strongest and most consistent moderator with operational validities in the .30s and .40s for measures that assessed AP in major-specific courses or courses in which students are evaluated on behaviors relevant to their future jobs (e.g., practicum classes). Overall, researchers and organizations should carefully consider whether and how AP is relevant to particular jobs and outcomes, as well as use designs and measures that optimize the predictive value of AP.