14 January 2014We provide new evidence about a positive correlation between the own amount sent and the own amount returned in the investment game. Our analysis relies on experimental data collected under the strategy method for establishing our main result. While the percentage returned is independent of the amount received for most of our subjects, it is strongly correlated to their amount sent as a trustor. Our analysis is based on a two-way classification of subjects : according to their trusting type and according to their reciprocal type. We show the existence of a strong correlation between trusting types and reciprocal types within subjects.