Reconsidering the Evolution of Nonlinguistic Communication: The Case of Laughter

Nonlinguistic communication is typically proposed to convey representational messages, implying that particular signals are associated with specific signaler emotions, intentions, or external referents. However, common signals produced by both nonhuman primates and humans may not exhibit such specificity, with human laughter for example showing significant diversity in both acoustic form and production context. We therefore outline an alternative to the representational approach, arguing that laughter and other nonlinguistic vocalizations are used to influence the affective states of listeners, thereby also affecting their behavior. In the case of laughter, we propose a primary function of accentuating or inducing positive affect in the perceiver in order to promote a more favorable stance toward the laugher. Two simple strategies are identified, namely producing laughter with acoustic features that have an immediate impact on listener arousal, and pairing these sounds with positive affect in the listener to create learned affective responses. Both depend on factors like the listener's current emotional state and past interactions with the vocalizer, with laughers predicted to adjust their sounds accordingly. This approach is used to explain findings from two experimental studies that examined the use of laughter in same-sex and different-sex dyads composed of either friends or strangers, and may be applicable to other forms of nonlinguistic communication.     

Nasality of Infant Vocalizations Determines Gender Bias in Adult Favorability Ratings

Adults rate vocalizing 3-month-old boys as more socially favorable (pleasant, friendly, fun, likeable, cuddly, cute) than girls when they are producing syllabic sounds. Is the preference due to gender bias or to actual sex differences in the acoustical quality of early vocalizations? In Experiment 1, 59 adults rated videotaped segments of 4 vocalizing boys and 4 vocalizing girls who were dressed identically in white gowns, and labelled with a name representing their sex or a name of the opposite sex. Two infants of each sex produced syllabic sounds, and 2 produced vocalic sounds. Adults rated boys producing syllabic sounds more favorably even when the boys were labelled with the names of girls. Therefore, the preference was not due to gender bias. In Experiment 2, 3 groups of adults (N = 50, 49, and 50, respectively) each viewed and rated 1 of 3 different sets of videotaped infants. The videotapes contained segments of 8 infants (4 boys, 4 girls, 2 of each producing syllabic sounds, and 2 producing vocalic sounds); infants appeared dressed in identical white gowns and were identified only by number, not by name or sex. In addition to the social favorability ratings, adults guessed the sex of the infant. Adults rated syllabic boys more favorably even though gender was disguised, and even though their guesses of gender were no better than chance. In Experiment 3, the vocalizations of the infants who were heard in the 3 videotapes were subjected to spectrographic acoustic analysis. The acoustic quality of boys' syllabic sounds differed from that of girls' only on the feature of nasality. As expected, syllabic, as compared with vocalic, sounds of both boys and girls were similarly longer in duration and differed in frequency characteristics, but these differences were related only to sound category and not to sex. The variance in adult social favorability ratings due to sex of infant was explained by the less nasal acoustic quality of the boys' voices. These results have implications for early socialization, because we know that mothers respond more to less nasal vocalizations. These results parallel the less nasal quality of men's voices as compared with women's voices, and suggest continuities from early vocalizations to speech.     

Laughter in Conversation: Features of Occurrence and Acoustic Structure

Although human laughter mainly occurs in social contexts, most studies have dealt with laughter evoked by media. In our study, we investigated conversational laughter. Our results show that laughter is much more frequent than has been described previously by self-report studies. Contrary to the common view that laughter is elicited by external stimuli, participants frequently laughed after their own verbal utterances. We thus suggest that laughter in conversation may primarily serve to regulate the flow of interaction and to mitigate the meaning of the preceding utterance. Conversational laughter bouts consisted of a smaller number of laughter elements and had longer interval durations than laughter bouts elicited by media. These parameters also varied with conversational context. The high intraindividual variability in the acoustic parameters of laughter, which greatly exceeded the parameter variability between subjects, may thus be a result of the laughter context.     

Realistic Free-Spins Features Increase Preference for Slot Machines

Despite increasing research into how the structural characteristics of slot machines influence gambling behaviour there have been no experimental investigations into the effect of free-spins bonus features—a structural characteristic that is commonly central to the design of slot machines. This series of three experiments investigated the free-spins feature using slot machine simulations to determine whether participants allocate more wagers to a machine with free spins, and, which components of free-spins features drive this preference. In each experiment, participants were exposed to two computer-simulated slot machines—one with a free-spins feature or similar bonus feature and one without. Participants then completed a testing phase where they could freely switch between the two machines. In Experiment 1, participants did not prefer the machine with a simple free-spins feature. In Experiment 2 the free-spins feature incorporated additional elements such as sounds, animations, and an increased win frequency; participants preferred to gamble on this machine. The Experiment 3 “bonus feature” machine resembled the free spins machine in Experiment 2 except spins were not free; participants showed a clear preference for this machine also. These findings indicate that (1) free-spins features have a major influence over machine choice and (2) the “freeness” of the free-spins bonus features is not an important driver of preference, contrary to self-report and interview research with gamblers.     

Learning While Babbling: Prelinguistic Object‐Directed Vocalizations Indicate a Readiness to Learn

Two studies illustrate the functional significance of a new category of prelinguistic vocalizing—object‐directed vocalizations (ODVs)—and show that these sounds are connected to learning about words and objects. Experiment 1 tested 12‐month‐old infants’ perceptual learning of objects that elicited ODVs. Fourteen infants’ vocalizations were recorded as they explored novel objects. Infants learned visual features of objects that elicited the most ODVs but not of objects that elicited the fewest vocalizations. Experiment 2 assessed the role of ODVs in learning word–object associations. Forty infants aged 11.5 months played with a novel object and received a label either contingently on an ODV or on a look alone. Only infants who received labels in response to an ODV learned the association. Taken together, the findings suggest that infants’ ODVs signal a state of attention that facilitates learning.     

When Sharing a Laugh Means Sharing More: Testing the Role of Shared Laughter on Short-Term Interpersonal Consequences

Laughter is a common social behavior. Yet when, why, and how laughter may cause positive relationship change is largely unexamined, empirically. The current studies focus on shared laughter (i.e., when), drawing from theory in relationship science to emphasize the importance of conceptualizing laughter as situated within the dyadic context (i.e., why). Specifically, these studies target untested possible short-term outcomes from social interactions involving shared laughter: positive emotions, negative emotions, and perceived similarity. In turn, each are tested as possible mechanisms through which shared laughter promotes more global relationship well-being (i.e., how). A series of online and laboratory studies provide correlational and causal support for the hypothesis that shared laughter promotes relationship well-being, with increased perceptions of similarity most consistently driving this effect. Discussion focuses on the importance of considering the behavior of laughter itself, as situated within the social context, when making predictions about laughter’s relevance for social life.     

Ratings of social functioning in outpatients with schizophrenia: Patient self-report versus caregiver assessment

Patients with schizophrenia often have deficits in day-to-day functioning that are central to their disability. The ability of patients to rate their own social functioning, however, has not been established. In this study we examined the concordance between the ratings on the Social Functioning Scale of 58 outpatients with schizophrenia and their caregivers. We found a high level of overall concordance between the self and informant ratings. Items measuring the frequency of behaviors were among those with the highest concordance, while ratings of ability or social skill showed lower correlations. On only nine of 73 items did patients rate themselves significantly higher than did caregivers. There was no difference in concordance between family and nonfamily caregivers. These findings indicate that outpatients with schizophrenia can provide self-report ratings that are consistent with the ratings of their caregivers.     

Infant‐Directed Prosody Helps Infants Map Sounds to Meanings

Adults typically use an exaggerated, distinctive speaking style when addressing infants. However, the effects of infant‐directed (ID) speech on infants' learning are not yet well understood. This research investigates how ID speech affects how infants perform a key function in language acquisition, associating the sounds of words with their meanings. Seventeen‐month‐old infants were presented with two label‐object pairs in a habituation‐based word learning task. In Experiment 1, the labels were produced in adult‐directed (AD) speech. In Experiment 2, the labels were produced in ID prosody; they had higher pitch, greater pitch variation, and longer durations than the AD labels. We found that infants failed to learn the labels in AD speech, but succeeded in learning the same labels when they were produced in ID speech. Experiment 3 investigated the role of variability in learning from ID speech. When the labels were presented in ID prosody with no variation across tokens, infants failed to learn them. Our findings indicate that ID prosody can affect how readily infants map sounds to meanings and that the variability in prosody that is characteristic of ID speech may play a key role in its effect on learning new words.     

Shake,Rattle, and … One or Two Objects? Young Infants' Use of Auditory Information to Individuate Objects

Most research on object individuation in infants has focused on the visual domain. Yet the problem of object individuation is not unique to the visual system, but shared by other sensory modalities. This research examined 4.5‐month‐old infants' capacity to use auditory information to individuate objects. Infants were presented with events in which they heard 2 distinct sounds, separated by a temporal gap, emanate from behind a wide screen; the screen was then lowered to reveal 1 or 2 objects. Longer looking to the 1‐ than 2‐object display was taken as evidence that the infants (a) interpreted the auditory event as involving 2 objects and (b) found the presence of only 1 object when the screen was lowered unexpected. The results indicated that the infants used sounds produced by rattles, but not sounds produced by an electronic keyboard, as the basis for object individuation (Experiments 1 and 2). Data collected with adult participants revealed that adults are also more sensitive to rattle sounds than electronic tones. A final experiment assessed conditions under which young infants attend to rattle sounds (Experiment 3). Collectively, the outcomes of these experiments suggest that infants and adults are more likely to use some sounds than others as the basis for individuating objects. We propose that these results reflect a processing bias to attend to sounds that reveal something about the physical properties of an object—sounds that are obviously linked to object structure—when determining object identity.     

Reactions to a partner-assisted emotional disclosure intervention: direct observation and self-report of patient and partner communication

Partner-assisted emotional disclosure is a couple-based intervention designed to help patients disclose cancer-related concerns to their spouses-partners. We previously found that, compared with an education/support control condition, partner-assisted emotional disclosure led to significant improvements in relationship quality and intimacy for couples in which the patient initially reported holding back from discussing cancer-related concerns (Porter et al., 2009, Cancer, 115, 4326-4338). The purpose of this study was to examine the process data from couples who participated in the disclosure sessions including (a) observational ratings of couples' communication during the sessions; (b) couples' ratings of their communication during the sessions; and (c) associations between participants' observed communication and their baseline psychological/relationship functioning. As rated by trained observers, couples' communication was in the moderate range of adaptive skills. Self-report data indicated that participants had positive perceptions of their communication. Observational and self-report ratings were weakly associated. Patients reporting lower levels of relationship quality, higher levels of holding back, and higher partner avoidance at baseline were rated by observers as more expressive during the sessions. Overall, these findings suggest that the intervention was acceptable to couples and was particularly helpful for patients who had difficulty talking with their partners on their own without skills training.     

DURATION MODELS FOR CREDIT RATING MIGRATION: EVIDENCE FROM THE FINANCIAL CRISIS

We introduce a specific duration model to analyze the prediction of the credit rating migration. We consider hazard rate processes based on multi‐state autoregressive conditional duration models. To take account of the economic context, we model the conditional mean of the duration between two ratings by means of a latent process. To this purpose, a dynamic‐ordered probit model is developed to describe the directions taken by the ratings in the presence of multiple states. As an illustration, we study the migration of credit rating during periods before and after the financial crisis. (JEL C14, C41, G24)     

Evaluation of single and mixed verbal operant arrangements for teaching mands and tacts

The purpose of this series of experiments was to evaluate the effects of mixed mand-tact arrangements on the acquisition of mands and tacts in preschool-aged children. In Experiment 1, the effects of three training arrangements (mand-only training, tact-only training, and mand-tact training) were investigated with 3 typically developing children. Rates of acquisition in single (mand-only and tact-only) versus mixed (mand-tact) presentation were comparable, in contrast to earlier investigations. Experiment 2 attempted to clarify the equivocal findings of Experiment 1 by directly replicating the Carroll and Hesse (1987) investigation with 2 typically developing children. Results again demonstrated no clear benefit of mixed verbal operant training on tact acquisition. In Experiment 3, these same arrangements were evaluated with a boy with autism and included assessments to determine that a relevant establishing operation was in effect prior to each mand training session. Experiment 3 again failed to demonstrate the facilitative effects of mand-tact training on the acquisition of mands or tacts. Taken together, the data from these three experiments fail to support the improved efficiency of mand-tact training suggested by prior studies. Findings are discussed in the context of future research investigating mixed verbal operant arrangements.     

Leniency Bias in Evaluating Clinical Social Work Student Interns

Leniency bias, or the tendency to evaluate individuals more favorably than is warranted, can prevent accurate evaluation and constructive supervision. This study tested leniency bias among field instructors of 90 clinical social work interns by comparing face-to-face and anonymous field instructors’ ratings of students’ knowledge, values, and skills. We also compared students’ own ratings to field instructors’ assessments. Results indicated little variance and consistently high ratings when field instructors evaluated face-to-face. There was greater variance and lower mean ratings when supervisors evaluated anonymously. Students’ self-assessments were the most critical and best matched the anonymous evaluations; whereas, the anonymous and face-to-face field instructor evaluations significantly differed on most items. These findings suggest the need for evaluation training for field instructors and the use of multiple assessment methods.     

Moving Smiles: The Role of Dynamic Components for the Perception of the Genuineness of Smiles

Three experiments were conducted to examine whether the temporal dynamics of Duchenne-smiles influenced the perception of smile authenticity. Realistic computer-generated Duchenne-smiles that varied in their onset- and offset-durations (Experiment 1), or only in their offset-duration (Experiment 2), or in both their onset- and apex-durations (Experiment 3), were created using Poser 4 software. Perceived genuineness varied monotonically with the duration of each manipulated dynamic component. The results are in accordance with Ekman and Friesens (1982) observations regarding the duration of smiles of enjoyment, which suggest that each dynamic component has a distinct duration range that can influence the perceived genuineness of smiles.We wish to thank Jesse Spencer-Smith for sharing the AU morph targets that have been developed in the context of his research.     

Laughter in medical interaction: From quantification to analysis,and back

This study discusses the use of quantification in analysing interactional practices, especially in conversation analytical work. The paper concentrates on laughter in medical interaction and starts from a quantitative point of view. West (1984) found certain statistical patterns of laughter in medical interaction: the patients laugh more than the doctors and most laughter is not reciprocated, i.e. the interactants mostly laugh alone. This statistical pattern is also found in Finnish data but it is approached again from the micro‐analytical point of view and some features of it are problematised through analysing in more detail: (1) the ways in which laughter is made relevant; (2) how laughter is responded to; and (3) the interactional functions laughter can have. The paper shows that Schegloff’s (1993) critique of quantitative interactional work is indeed called for, but nevertheless also presents advantages of quantification: the distribution of laughter between the participants in medical interaction turned out to be an interesting issue, one which is revealing of their different interactional roles and footings.     

Distributional Phonetic Learning at 10 Months of Age

Infant phonetic perception reorganizes in accordance with the native language by 10 months of age. One mechanism that may underlie this perceptual change is distributional learning, a statistical analysis of the distributional frequency of speech sounds. Previous distributional learning studies have tested infants of 6–8 months, an age at which native phonetic categories have not yet developed. Here, three experiments test infants of 10 months to help illuminate perceptual ability following perceptual reorganization. English‐learning infants did not change discrimination in response to nonnative speech sound distributions from either a voicing distinction (Experiment 1) or a place‐of‐articulation distinction (Experiment 2). In Experiment 3, familiarization to the place‐of‐articulation distinction was doubled to increase the amount of exposure, and in this case infants began discriminating the sounds. These results extend the processes of distributional learning to a new phonetic contrast, and reveal that at 10 months of age, distributional phonetic learning remains effective, but is more difficult than before perceptual reorganization.     

Explaining the Effects of Powerless Language Use on the Evaluative Listening Process: A Theory of Implicit Prototypes

This study examined the effects of forewarning and discounting messages on the evaluational consequences of powerless language use. The specific forewarning message contained information on types of powerless language (including hesitations) and their effects. The general forewarning message excluded mention of hesitations. The discounting message cautioned against making trait attributions based on powerless language behaviors. In Experiment #1, listeners exposed to the specific and general forewarning messages gave lower competence ratings to the lecturer and were less likely to recommend that he be hired as an instructor. The discounting message did not moderate negative evaluations of the lecturer. In Experiment #2, a one week delay was inserted between the forewarning and discounting messages and the oral presentation. No significant differences were found between the activation conditions and the control condition. The results of this study suggest that the theory of implicit prototypes may explain how the evaluative listening process forms impressions of powerless and powerful sources.     

New Zealand Vietnam Veterans’ Family Programme,Nga Whanau a Tu (Families of War): Development and Outcome

This article reviews recent research concerned with the association between combat-related posttraumatic stress disorder (PTSD) and interpersonal functioning, before describing the development of a pilot program established to provide mental health services for Vietnam veteran family members. The results of a brief program evaluation are also presented. Sixty clients provided posttreatment and six-month follow-up data on a variety of outcome measures which were compared with independent ratings returned by 33 therapists. On average, clients reported that counselling had been beneficial and indicated satisfaction with services received. However, at posttest, therapists indicated that approximately 50% of clients were in need of continued treatment. There was a decrease in satisfaction with services over the posttest-follow-up period, but no change on most measures of psychotherapy outcome.