People differ in their sensitivity to the environment: An integrated theory, measurement and empirical evidence

People differ in their response to experiences with some being generally more and some less sensitive. We present an integrated theoretical perspective on Environmental Sensitivity and provide new empirical evidence. Results across three studies (total N = 910) suggest that sensitivity can be measured reliably and validly with the 12-item Highly Sensitive Person scale (HSP-12). People scoring high on the HSP-12 are more sensitive to both adverse and positive experiences. Higher scores on the HSP-12 are reflected in high Neuroticism, particularly anxiety and vulnerability, and high Openness, particularly imagination, artistic interests and emotionality. We conclude that findings confirm the theoretical proposition that people differ in their sensitivity to environmental influences, and propose a number of future directions to advance research.