Ikuo Daibo

Effects of gaze and speech rate on receivers' evaluations of persuasive speech.

This study examined how gaze and speech rate affect perceptions of a speaker. Participants viewed a video recording of one of four persuasive messages delivered by a female speaker. Analysis of speech rate, gaze, and listeners sex revealed that when combined with a small amount of gaze, slow speech rate decreased trustworthiness as compared to a fast speech rate. For women, slow speech rate was thought to be indicative of less expertise as compared to a fast speech rate, again when combined with low gaze. There were no significant interactions, but there were main effects of gaze and speech rate on persuasiveness. High levels of gaze and slow speech rate each enhanced perceptions of the speakers persuasiveness.

Cup-le : A cup-shaped device for conversational experiment

We propose a cup-shaped device called Cup-le for conversational experiment. Cup-le has various sensors to record participants nonverbal behavior such as utterance. Cup-le saves the work of attaching sensors. Also, since Cup-le appears cup-shaped, it can sense without being aware of the sensor unlike conventional wearable sensors. Moreover, by attaching touch display, Cup-le can show information and can be operated. In this conversational experiment, we use the input-output as method to have a questionnaire during the experiment and capture participants impression for their conversation. We conducted real conversational experiment with Cup-le, and we confirmed that Cup-le supported sufficiently the experiment without affecting their impression.

Application of a self-evaluation maintenance model to psychological health in interpersonal contexts

This study examines the possibility of applying Tessers (1988) Self-Evaluation Maintenance Model, which focuses on self-esteem, to individual psychological health in interpersonal contexts. The participants consist of 243 college students divided into same-sex friendship pairs. The main findings show that when comparing oneself with an close friend in a domain one finds important, positive self-perception is more closely related to psychological health than a positive perception of the friend. In domains not important to the self, no relationship between psychological health and self-perception was found, regardless of the degree of intimacy. These results indicate that the degree of intimacy with the compared person and the degree of importance ascribed to the aspect being compared are connected with individual psychological health. These findings are discussed in relationship to application of the Self-Evaluation Maintenance Model to psychological health.

Affect as an antecedent of synchrony: A spectrum analysis with wavelet transform

This study explored whether affect could be an antecedent of synchrony (i.e., the convergence of rhythm and timing) in face-to-face conversations. Although previous studies have failed to illustrate that affective valence causes synchrony, they did not employ experimental manipulation of affective state and did not consider the affective contrast between interacting participants. In this study, two experiments were conducted on dyadic interactions with a same-sex stranger. Experiment 1 focused on affective valence, and Experiment 2 investigated the influence of affective contrast on synchrony. Participants engaged in a 6-min chat. Positive or negative affect was separately induced using a video (Experiment 1) or an affective picture set (Experiment 2) before conversation to stimulate each two conditions: positive versus negative affective state (Experiment 1) or low versus high contrast in affective state (Experiment 2). Synchrony was evaluated using wavelet transform, via calculation of the cross-wavelet coherence (WTC) and relative phasing pattern (i.e., in-phase and anti-phase), as well as cross-correlation. Results showed that cross-WTC and proportion of in-phase patterning were not influenced by affective valence (Experiments 1 and 2); however, they were higher in the low-contrast condition compared with the high-contrast condition (Experiment 2). Cross-correlation, on the contrary, could not find a significant difference in Experiments 1 and 2. These results were discussed from the perspective of cognitive and motivational processes.