AI Psychometrics: Evaluating the Psychological Reasoning of Large Language Models with Psychometric Validities

TL;DR

This paper applies psychometric methods to evaluate the psychological reasoning and validity of large language models, revealing that higher-performing models show better psychometric validity, thus supporting AI Psychometrics as a useful evaluation approach.

Contribution

It introduces AI Psychometrics as a novel framework for evaluating LLMs' psychological reasoning using psychometric validity criteria.

Findings

All models met validity criteria

GPT-4 and LLaMA-3 showed superior validity

Higher model performance correlates with better psychometric validity

Abstract

The immense number of parameters and deep neural networks make large language models (LLMs) rival the complexity of human brains, which also makes them opaque ``black box'' systems that are challenging to evaluate and interpret. AI Psychometrics is an emerging field that aims to tackle these challenges by applying psychometric methodologies to evaluate and interpret the psychological traits and processes of artificial intelligence (AI) systems. This paper investigates the application of AI Psychometrics to evaluate the psychological reasoning and overall psychometric validity of four prominent LLMs: GPT-3.5, GPT-4, LLaMA-2, and LLaMA-3. Using the Technology Acceptance Model (TAM), we examined convergent, discriminant, predictive, and external validity across these models. Our findings reveal that the responses from all these models generally met all validity criteria. Moreover, higher-performing models like GPT-4 and LLaMA-3 consistently demonstrated superior psychometric validity compared to their predecessors, GPT-3.5 and LLaMA-2. These results help to establish the validity of applying AI Psychometrics to evaluate and interpret large language models.