The acoustic effects of the adjustment in vocal effort that is required when the distance between speaker and addressee is varied over a large range (0.3-187.5 m) were investigated in phonated and, at shorter distances, also in whispered speech. Several characteristics were studied in the same sentence produced by men, women, and 7-year-old boys and girls: duration of vowels and consonants, pausing and occurrence of creaky voice, mean and range of F0, certain formant frequencies (F1 in [a] and F3), sound-pressure level (SPL) of voiced segments and [s], and spectral emphasis. In addition to levels and emphasis, vowel duration, F0, and F1 were substantially affected. "Vocal effort" was defined as the communication distance estimated by a group of listeners for each utterance. Most of the observed effects correlated better with this measure than with the actual distance, since some additional factors affected the speakers' choice. Differences between speaker groups emerged in segment durations, pausing behavior, and in the extent to which the SPL of [s] was affected. The whispered versions are compared with the phonated versions produced by the same speakers at the same distance. Several effects of whispering are found to be similar to those of increasing vocal effort.

Ayahuasca is a psychoactive brew used by the indigenous populations of the Amazon. The aim of this qualitative study was to gain insight into the experiences of western users of ayahuasca, as well as to ascertain the experienced meaning that participants felt by their participation. Twenty-five people from Northern Europe with experiences of group sessions with ayahuasca wrote anonymous descriptions of their experiences. The Empirical Phenomenological Psychological method was used for this analysis. The analysis resulted in 33 categories which were assembled into six general themes: (a) motivation and aim, (b) contractile frightening state (c) sudden transformation of the experience, (d) limitless expansive states with transcendental experiences, (f) reflections, and (g) changed worldview and new orientation to life. These themes provided a new structure, called the transcendental circle. Participants reported many positive psychological and physical improvements that indicate that ayahuasca could be of potential interest in the development of new medicines and therapies.

The purpose of this project was to do a qualitative study of an integrated and flexible ACT model, the Resource Group Assertive Community Treatment (RACT), as seen from the perspective of case managers in training. The resource group normally consists of the client, the case manager and other available personnel in the medical and support areas, as well as family members. Nineteen theses were randomly chosen from a set of 80 theses written by a group of Swedish trainee case managers. The exams were conducted as case studies and concerned 19 clients with psychotic problems, 11 men and 8 women. “The Empirical Phenomenological Psychological Method” was used in the analysis, which generated five overarching themes: (a) the RACT program; (b) the resource group; (c) the empowerment of the client; (d) progress in treatment; and (e) the case manager. These together constituted a “therapeutic circle,” in which methods and tools used within the RACT made it possible for the resource group to empower the clients who, as a result, experienced progress with treatment, during which the case manager was the unifying and connecting link.

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This study examined the reliability of earwitnesses using an ecologically realistic experimental set-up. A total of 282 participants, distributed over three age-groups (7-9 vs. 11-13 year olds vs. adults), were exposed to an unfamiliar voice for 40 seconds. After a two week delay, they were presented with a 7-voice lineup. Half of the participants were exposed to a target-present lineup (TP), and the other half to a target-absent lineup (TA). For both types of lineups the participants performed poorly. In the TP-condition only the 11-13-year olds (with 27% correct identifications) performed above chance level. Furthermore, in the TA-condition all agegroups showed a high willingness to make an identification (overall mean=53%). For both groups of children, voice identification co-varied significantly with speaking rate and pitch level, as did pitch variation for the youngest children. Neither factor correlated significantly with the adults' identifications.

In order to learn how listeners evaluate F0 excursions, a set of experiments was performed in which subjects had to estimate the liveliness of utterances. The stimuli were obtained by LPC analysis of one natural utterance that was modified by resynthesizing F0, the formant frequencies, and the time scale in order to simulate some of the natural extra- and paralinguistic variations that affect F0 and/or liveliness, namely the speaker's age, sex, articulation rate, and voice register. In each case, the extent of the F0 excursions was varied in seven steps. The results showed that, as long as the stimuli appeared to have been produced in the modal register (of men, women, and children), listeners judged F0 intervals to be equivalent if they were equal in semitones. When the voice register was shifted without adjustment in articulation, listeners appeared to judge the F0 excursions in relation to the spectral space available below F1. The liveliness ratings were found to be strongly dependent on articulation rate and to be affected by the perceived age of the speaker which, with the manipulated stimuli used here, turned out to be significantly affected by the sex of the listener.

A lie detector which can reveal lie and deception in some automatic and perfectly reliable way is an old idea we have often met with in science fiction books and comic strips. This is all very well. It is when machines claimed to be lie detectors appear in the context of criminal investigations or security applications that we need to be concerned. In the present paper we will describe two types of 'deception' or 'stress detectors' (euphemisms to refer to what quite clearly are known as 'lie detectors'). Both types of detection are claimed to be based on voice analysis but we found no scientific evidence to support the manufacturers' claims. Indeed, our review of scientific studies will show that these machines perform at chance level when tested for reliability. Given such results and the absence of scientific support for the underlying principles it is justified to view the use of these machines as charlatanry and we argue that there are serious ethical and security reasons to demand that responsible authorities and institutions should not get involved in such practices.

The major aim was to examine the effect of the perpetrator's tone of voice and time delay on voice recognition. In addition, the effect of two types of voice description interviews intended to strengthen voice encoding was tested. Both 11‐ to 13‐year‐olds (n = 160) and adults (n = 148) heard an unfamiliar voice for 40 s. The perpetrator either spoke in a normal tone at encoding and in the lineup (congruent), or in an angry tone at encoding and a normal tone in the lineup (incongruent). Witnesses were then interviewed about the voice with global questions or by rating voice characteristics. Half of the witnesses were presented with a lineup shortly after the interview (immediate) and the others after 2 weeks (delayed). Children tested immediately made significantly more correct identifications. This was not the case for adults. (In)congruency between tone of voice and interview type did not significantly affect voice recognition. Witnesses in the congruent–immediate condition performed the best. However, only 25% of the children and 19% of the adults made correct identifications. Poor identification accuracy and the fact that the majority of witnesses believed they would recognise the voice later are reasons for treating voice identification evidence with great caution. Copyright © 2013 John Wiley & Sons, Ltd.