Fig 1. Generation of the voice trustworthiness continuum.

a. Thirty-two male voices saying “hello” are represented as points in a 2D “social voice space” with axes mapping onto their perceived Trustworthiness and Dominance, respectively (cf. [4]). Coloured dots indicate voices within the bottom (blue dots) and top (red dots) 25% for Trustworthiness ratings. b. A Low- and a High-Trustworthiness prototype were generated by averaging via morphing the bottom and top 25% rated voices, respectively. c. A 9-stimulus “Trustworthiness continuum “was generated via morphing in 8 acoustically equal steps using the two prototypes in intermediate positions and extrapolating to low- and high- Trustworthiness caricatures at extreme positions.