What Does Your Voice Reveal About You?

The first goal of the present study was to explore how 21 voice measures related to self-reported personality and communication styles. The second goal was to test the assertion of Trait Activation Theory (TAT) that traits are activated in relevant situations and that verbal behavior is the result of an interplay between individual differences and situations. The voice of 138 participants was measured in the lab via steady voice and continuous speech tasks, whereas personality and communication styles were self-reported using the HEXACO and Communication Styles Inventory. To test TAT, four scenarios were developed to activate the communication styles of Informality and Expressiveness. It was hypothesized that the activated communication styles will interact with relevant situations and will be expressed through changes in voice (i.e., pitch variation). Regarding the first goal, an explorative approach revealed that voice characteristics are informative mainly for the personality traits of Openness to Experience, Emotionality, and Conscientiousness and the communication styles of Emotionality and Questioningness. Regarding the second goal, the interactions between situations and communication styles provided mixed support for TAT. Implications and limitations of the study are discussed.

Odour-Mediated Interactions Between an Apex Reptilian Predator and its Mammalian Prey

An important but understudied modality for eavesdropping between predators and prey is olfaction, especially between non-mammalian vertebrate predators and their prey. Here we test three olfactory eavesdropping predictions involving an apex reptilian predator, the sand goanna Varanus gouldii, and several species of its small mammalian prey in arid central Australia: 1) small mammals will recognise and avoid the odour of V. gouldii; 2) V. gouldii will be attracted to the odour of small mammals, especially of species that maximise its energetic returns; and 3) small mammals will be less mobile and will show higher burrow fidelity where V. gouldii is absent compared with where it is present. As expected, we found that small mammals recognised and avoided faecal odour of this goanna, feeding less intensively at food patches where the odour of V. gouldii was present than at patches with no odour or a pungency control odour. Varanus gouldii also was attracted to the odour of small mammals in artificial burrows, and dug more frequently at burrows containing the odour of species that were energetically profitable than at those of species likely to yield diminished returns. Our third prediction received mixed support. Rates of movement of three species of small mammals were no different where V. gouldii was present or absent, but burrow fidelity in two of these species increased as expected where V. gouldii had been removed. We conclude that olfaction plays a key role in the dynamic interaction between V. gouldii and its mammalian prey, with the interactants using olfaction to balance their respective costs of foraging and reducing predation risk. We speculate that the risk of predation from this apex reptilian predator drives the highly unusual burrow-shifting behaviour that characterises many of Australia's small desert mammals.

Synergistic epistasis of the deleterious effects of transposable elements

The replicative nature and generally deleterious effects of transposable elements (TEs) raise an outstanding question about how TE copy number is stably contained in host populations. Classic theoretical analyses predict that, when the decline in fitness due to each additional TE insertion is greater than linear, or when there is synergistic epistasis, selection against TEs can result in a stable equilibrium of TE copy number. While several mechanisms are predicted to yield synergistic deleterious effects of TEs, we lack empirical investigations of the presence of such epistatic interactions. Purifying selection with synergistic epistasis generates repulsion linkage between deleterious alleles. We investigated this population genetic signal in the likely ancestral Drosophila melanogaster population and found evidence supporting the presence of synergistic epistasis among TE insertions, especially TEs expected to exert large fitness impacts. Even though synergistic epistasis of TEs has been predicted to arise through ectopic recombination and TE-mediated epigenetic silencing mechanisms, we only found mixed support for the associated predictions. We observed signals of synergistic epistasis for a large number of TE families, which is consistent with the expectation that such epistatic interaction mainly happens among copies of the same family. Curiously, significant repulsion linkage was also found among TE insertions from different families, suggesting the possibility that synergism of TEs’ deleterious fitness effects could arise above the family level and through mechanisms similar to those of simple mutations. Our findings set the stage for investigating the prevalence and importance of epistatic interactions in the evolutionary dynamics of TEs.

Do human values predict perceptions, attitudes & behaviours towards the New Zealand marine environment?

<p>Human values predict perceptions, attitudes and behaviours towards the NZ marine environment. A confidential online survey (The New Zealand Marine Values Survey) was completed by 1,567 NZ citizens and residents in September and October of 2019. Respondents answered a variety of questions relating to demographic variables, PABs (perceptions, attitudes and behaviours) towards the NZ marine environment, and psychographic variables. Human values (values), as conceptualised and operationalised in the Theory of Basic Human Values by social psychologist and cross-cultural researcher Shalom H. Schwartz, have been demonstrated to be universal in nature and capable of predicting a range of PABs. Respondents’ prioritisation of values were measured using the latest Portrait Values Questionnaire (PVQ-RR). Statistical analysis identified many significant (p < .01) relationships between values and variables of interest, including the New Ecological Paradigm (NEP) and a variety of PAB scales created in undertaking this research. Values explained between 24.6% and 57.2% of the variance seen in 14 scales, with each of the 19 value domains proving to be of some significance (p < .01) in the regression analyses performed. Universalism values were prominent in many of the analyses and often exhibited negative relationships with Conservation values. Findings provided mixed support for the Value Belief Norm (VBN) theory, which postulates a causal chain between values, worldviews, norms, and behaviour. Benevolence values, despite being prioritised strongly by the sample population as a whole, explained little of the variance seen in PABs towards the NZ marine environment and were an unexpected negative predictor of the NEP. This research provides an overview of how individuals, from a large sample of New Zealanders with an interest in the marine environment, prioritise human values and how these values are likely to inform PABs towards the NZ marine environment. This research should provide valuable insights to any individual or organisation hoping to engage with stakeholders in the NZ marine environment in a more meaningful and effective manner —especially those confronted with social barriers to change.</p>

Do human values predict perceptions, attitudes & behaviours towards the New Zealand marine environment?

<p>Human values predict perceptions, attitudes and behaviours towards the NZ marine environment. A confidential online survey (The New Zealand Marine Values Survey) was completed by 1,567 NZ citizens and residents in September and October of 2019. Respondents answered a variety of questions relating to demographic variables, PABs (perceptions, attitudes and behaviours) towards the NZ marine environment, and psychographic variables. Human values (values), as conceptualised and operationalised in the Theory of Basic Human Values by social psychologist and cross-cultural researcher Shalom H. Schwartz, have been demonstrated to be universal in nature and capable of predicting a range of PABs. Respondents’ prioritisation of values were measured using the latest Portrait Values Questionnaire (PVQ-RR). Statistical analysis identified many significant (p < .01) relationships between values and variables of interest, including the New Ecological Paradigm (NEP) and a variety of PAB scales created in undertaking this research. Values explained between 24.6% and 57.2% of the variance seen in 14 scales, with each of the 19 value domains proving to be of some significance (p < .01) in the regression analyses performed. Universalism values were prominent in many of the analyses and often exhibited negative relationships with Conservation values. Findings provided mixed support for the Value Belief Norm (VBN) theory, which postulates a causal chain between values, worldviews, norms, and behaviour. Benevolence values, despite being prioritised strongly by the sample population as a whole, explained little of the variance seen in PABs towards the NZ marine environment and were an unexpected negative predictor of the NEP. This research provides an overview of how individuals, from a large sample of New Zealanders with an interest in the marine environment, prioritise human values and how these values are likely to inform PABs towards the NZ marine environment. This research should provide valuable insights to any individual or organisation hoping to engage with stakeholders in the NZ marine environment in a more meaningful and effective manner —especially those confronted with social barriers to change.</p>

Resilience in Vulnerable Small and New Social Enterprises

The use of financial ratios in predicting financial vulnerability has a large body of literature, but few studies address resilience and the recovery from financial distress. Further, no vulnerability studies specifically address the needs of small and young social enterprises. This study uses over twenty years of panel data to predict which factors signal the future recovery of small and young social enterprises. There is mixed support for hypotheses found in the literature, and though additional equity and revenue diversification is shown to be beneficial, increased surplus ratios carry implications which vary between financial stressors. Even in a sample of small organizations, we find evidence for the liability of smallness. Implications for practitioners, researchers, and policymakers are discussed.

Socioemotional Goals and Definitions of Emotion Terms: A Qualitative Analysis Across Age

Major theories of adult development posit that knowledge about emotion might evolve across the lifespan. Socioemotional Selectivity Theory (SST) and the Strength and Vulnerability Integration (SAVI) models imply that the manner in which older (OA) and younger adults (YA) conceptualize emotions may differ in valence, arousal, reference to social partners, time perspective, and the self. Quantitative accounts of age differences in conceptualizations of emotion-terms offer mixed support for theoretical expectations, but many predictions have yet to be tested qualitatively. In this study, 90 OA and 210 YA provided narrative descriptions of 11 (5 positive, 6 negative) emotion-terms. Responses were coded on valence, reference to self/others, and arousal. O/YA used similar synonyms to define emotion-terms. As predicted, YA used high arousal language in their definitions of negative (OR = 10.29, p = 0.018) and positive terms more than OA (i.e. Happy: OR = 1.27, p&lt;0.001); OA referenced other persons such as family and friends (pos: OR = 0.13, p&lt;0.001; neg: OA = 0.32, p=0.002) more than YA. Contrary to predictions, OA self-referenced more often than YA in positive (OR = 0.12, p=0.001) and negative definitions (OR= 0.11, p=0.004); this may be attributed to OA providing more situational examples in their responses than YA. Somewhat consistent with SAVI and SST, OA may reference high-arousal states less when conceptualizing emotions and associate their definitions more with social partners than YA. Future research should address OA greater use of situational examples when defining emotion terms, motivational factors and emotional impact of these age differences.

Kind or contented? An investigation of the gift exchange hypothesis in a natural field experiment in Colombia

The gift exchange hypothesis postulates that workers reciprocate above market-clearing wages with above-minimum effort. This hypothesis has received mixed support in dyadic employer-worker relationships. We present a field-experimental test to assess this hypothesis in the context of a triadic relationship in which only one out of two workers receives a pay increase. We conjecture that inequality aversion motivations may thwart positive reciprocity motivations and analyze the interaction between such motivations theoretically. Across three treatments, the pay increase is justified to workers based on either relative merit or relative need or was arbitrary as no justification was offered. Two conditions in which either one or both workers receive a bonus serve as the reference. In contrast to the gift exchange hypothesis, we find that pay increases lead to a decrease in productivity. Such a decrease is most sizable in the condition where both workers receive the bonus. A post-diction of this result is that workers interpret the monetary bonus as a signal of the employer’s contentment with their effort, which makes them feel entitled to reduce their effort. In other treatments, receiving the pay increase while the coworker does not has a positive effect on productivity, especially when the pay increase is based on merit. This result is consistent with statusseekingpreferences rather than aversion against advantageous inequality. Conversely, not receiving the pay increase while the coworker does, leads to lower productivity, especially when the pay increase is assigned based on relative needs.

Lexical Competition Effects in Aphasia

<p>Some aphasic patients show single word production deficits in some situations where object naming is required (e.g., they perform well when objects are presented in unrelated groups (e.g., Cat, Fork, Bread...), but deteriorate when the same items are presented in semantically related groups (e.g., Cat, Cow, Dog...)) (see Wilshire & McCarthy, 2002). We investigated whether context-sensitive single-word production impairments reflect an impaired ability to resolve lexical competition. Three groups of participants (non-fluent aphasics, fluent aphasics, and older controls) completed four tasks that manipulated lexical competition: 1) A category exemplar task, where a high competition condition involved generating items from broad categories (e.g., Animals: "Cat. Dog" etc.), and a low competition condition involved generating items from narrow categories (e.g., Pets: Cat. Dog" etc); 2) A verb generation task, where participants were presented with objects and were required to generate related verbs. The high competition objects were related to a range of verbs (e.g., Penny: Spend"/"Pay"/"Buy" etc), and the low competition objects were related to one dominant verb (e.g., Scissors: "Cut"); 3) A name agreement task where a high competition condition involved naming low name agreement objects (e.g., Artist/Painter), and a low competition condition involved naming of high name agreement objects (e.g., Anchor), and; 4) A sentence completion task, where extrinsic competition was introduced via presentation of auditory distracters. The low competition distracters did not make sense (e.g., Barry wisely chose to pay the RANGE: "Bill"/"Cashier" etc), whereas the high competition distracters did (e.g., Barry wisely chose to pay the FINE: "Bill"/Cashier" etc). Our first hypothesis was that all participants would show high competition costs in increased response latencies and/or decreased accuracy. At the group level, this hypothesis was supported in all four tasks. At the individual level, there was mixed support as some participants showed predicted effects on the verb generation, name agreement, and sentence completion tasks. The second hypothesis was that exaggerated competition costs would occur in some or all non-fluent aphasics. At the group level this hypothesis was not clearly supported on any task. At the individual level there was mixed support, with some indications that non-fluents may be more likely to show significant competition effects than fluents. The third hypothesis was that non-fluent aphasics with relatively well preserved single word production but relatively impaired sentence production may be most likely to show exaggerated lexical competition effects. There was little support for this hypothesis. It was concluded that the data do not support the hypothesis that context-sensitive single-word production impairments are symptomatic of an impaired ability to resolve lexical competition. However, we have gained information on how heterogeneous aphasics perform on tasks that manipulate lexical competition, and we have gained some insights that may direct future research down a path towards more informative results, and increased knowledge on the complex process of speech production.</p>

Lexical Competition Effects in Aphasia

<p>Some aphasic patients show single word production deficits in some situations where object naming is required (e.g., they perform well when objects are presented in unrelated groups (e.g., Cat, Fork, Bread...), but deteriorate when the same items are presented in semantically related groups (e.g., Cat, Cow, Dog...)) (see Wilshire & McCarthy, 2002). We investigated whether context-sensitive single-word production impairments reflect an impaired ability to resolve lexical competition. Three groups of participants (non-fluent aphasics, fluent aphasics, and older controls) completed four tasks that manipulated lexical competition: 1) A category exemplar task, where a high competition condition involved generating items from broad categories (e.g., Animals: "Cat. Dog" etc.), and a low competition condition involved generating items from narrow categories (e.g., Pets: Cat. Dog" etc); 2) A verb generation task, where participants were presented with objects and were required to generate related verbs. The high competition objects were related to a range of verbs (e.g., Penny: Spend"/"Pay"/"Buy" etc), and the low competition objects were related to one dominant verb (e.g., Scissors: "Cut"); 3) A name agreement task where a high competition condition involved naming low name agreement objects (e.g., Artist/Painter), and a low competition condition involved naming of high name agreement objects (e.g., Anchor), and; 4) A sentence completion task, where extrinsic competition was introduced via presentation of auditory distracters. The low competition distracters did not make sense (e.g., Barry wisely chose to pay the RANGE: "Bill"/"Cashier" etc), whereas the high competition distracters did (e.g., Barry wisely chose to pay the FINE: "Bill"/Cashier" etc). Our first hypothesis was that all participants would show high competition costs in increased response latencies and/or decreased accuracy. At the group level, this hypothesis was supported in all four tasks. At the individual level, there was mixed support as some participants showed predicted effects on the verb generation, name agreement, and sentence completion tasks. The second hypothesis was that exaggerated competition costs would occur in some or all non-fluent aphasics. At the group level this hypothesis was not clearly supported on any task. At the individual level there was mixed support, with some indications that non-fluents may be more likely to show significant competition effects than fluents. The third hypothesis was that non-fluent aphasics with relatively well preserved single word production but relatively impaired sentence production may be most likely to show exaggerated lexical competition effects. There was little support for this hypothesis. It was concluded that the data do not support the hypothesis that context-sensitive single-word production impairments are symptomatic of an impaired ability to resolve lexical competition. However, we have gained information on how heterogeneous aphasics perform on tasks that manipulate lexical competition, and we have gained some insights that may direct future research down a path towards more informative results, and increased knowledge on the complex process of speech production.</p>