Bayesian hypothesis testing for psychologists: A tutorial on the Savage–Dickey method

In the field of cognitive psychology, the p-value hypothesis test has established a stranglehold on statistical reporting. This is unfortunate, as the p-value provides at best a rough estimate of the evidence that the data provide for the presence of an experimental effect. An alternative and arguably more appropriate measure of evidence is conveyed by a Bayesian hypothesis test, which prefers the model with the highest average likelihood. One of the main problems with this Bayesian hypothesis test, however, is that it often requires relatively sophisticated numerical methods for its computation. Here we draw attention to the Savage–Dickey density ratio method, a method that can be used to compute the result of a Bayesian hypothesis test for nested models and under certain plausible restrictions on the parameter priors. Practical examples demonstrate the method’s validity, generality, and flexibility.     

Display-wide influences on figure–ground perception: The case of symmetry

Past research has demonstrated that convex regions are increasingly likely to be perceived as figures as the number of alternating convex and concave regions in test displays increases. This region-number effect depends on both a small preexisting preference for convex over concave objects and the presence of scene characteristics (i.e., uniform fill) that allow the integration of the concave regions into a background object/surface. These factors work together to enable the percept of convex objects in front of a background. We investigated whether region-number effects generalize to another property, symmetry, whose effectiveness as a figure property has been debated. Observers reported which regions they perceived as figures in black-and-white displays with alternating symmetric/asymmetric regions. In Experiments 1 and 2, the displays had articulated outer borders that preserved the symmetry/asymmetry of the outermost regions. Region-number effects were not observed, although symmetric regions were perceived as figures more often than chance. We hypothesized that the articulated outer borders prevented fitting a background interpretation to the asymmetric regions. In Experiment 3, we used straight-edge framelike outer borders and observed region-number effects for symmetry equivalent to those observed for convexity. These results (1) show that display-wide information affects figure assignment at a border, (2) extend the evidence indicating that the ability to fit background as well as foreground interpretations is critical in figure assignment, (3) reveal that symmetry and convexity are equally effective figure cues and, (4) demonstrate that symmetry serves as a figural property only when it is close to fixation.     

The impact of implicitly and explicitly primed ingroup–outgroup categorization on the evaluation of others pain: The case of the Jewish–Arab conflict

Despite the automaticity of affective sharing, many studies have documented the role of top-down effects, such as social categorization, on people’s empathic responses. An important question, largely ignored in previous research, concerns empathy to ingroup and outgroup members’ pain in the contexts of ongoing intergroup conflict. In the present study we examined how implicit and explicit ethnic social categorization of others affects empathy to pain in the context of the Israeli–Palestinian conflict. To meet this aim, we assessed the evaluation of pain by Jewish and Arab participants who viewed a series of visual stimuli depicting painful and non-painful familiar situations. The stimuli were associated with explicitly or implicitly primed typical names depicting ingroup, neutral outgroup, and adversary outgroup members. Results demonstrate that pain ratings in the explicit priming condition provide support for the ingroup empathy hypothesis, positing that empathy is higher for ingroup than for outgroup members for both Jews and Palestinian Arabs. Conversely, when the targets’ categories are primed implicitly, results revealed difference in empathy by the two ethnic groups where an ingroup bias was detected only for Palestinian Arabs. This suggests that the activation of ingroup bias on the subliminal implicit level among Palestinian Arab participants might be mediated by the amount of conflict permeating in their daily lives and by deeply rooted cultural values and behavioural patterns.     

The role of emotion in bridging the intention–behaviour gap: The case of sports participation

ProblemPsychological models of sports participation frequently draw on the Theory of Planned Behaviour (TPB) in order to predict health-behaviour-related intentions. While these models commonly show high predictive power with respect to intention, they often fall short in the prediction of behaviour (the ‘intention–behaviour gap’). The present study contends that integrating emotional processes into TPB can substantially improve the model's predictive power over and above traditional cognitive predictors.MethodIn a longitudinal study structural equation modelling was employed to test a traditional model (based on TPB) and an extended model including emotion associated with the intention to exercise as a mediator variable. A community sample (N = 237) completed a questionnaire measuring the components of a traditional TPB model. Prior to each of 16 expected exercise sessions (over 8 weeks) intention to exercise and emotion associated with the intention were measured.ResultsResults confirmed a substantial increase of 17% in explained variance of exercise frequency and 20% in exercise duration for the extended model. Emotional appraisal of the intention to exercise thus appears to mediate the traditional intention–behaviour relationship, suggesting that emotionally based interventions aimed at increasing sports participation may be helpful.ConclusionIt is concluded that emotion variables should be added to traditional TPB models in order to predict health behaviour more fully.     

The determination of theory by evidence: The case for quantum discontinuity, 1900–1915

The thesis that observation necessarily fails to determine theory is false in the sense that observation can provide overwhelming evidence for a particular theory or even a hypothesis within the theory. The saga of quantum discontinuity illustrates the power of evidence to determine theory and shows how that power can be underestimated by inadequate caricatures of the evidential case. That quantum discontinuity can save the phenomena of black body radiation is the widely known result, but it leaves open the possibilities of other accounts. That these phenomena, with the aid of minimal assumptions, entail quantum discontinuity is the crucial but now largely forgotten result. It was first demonstrated by Ehrenfest and Poincaré in 1911 and 1912.     

Comments on “The Ketamine Model of the Near-Death Experience: A Central Role for the N-Methyl-D-Aspartate Receptor”

Although ketamine can induce a state similar to a near-death experience (NDE), there is a striking difference between experiences induced by ketamine used in a recreational context and in an operating room. Ketamine is a noncompetitive antagonist of the N-methyl-D-aspartate receptor, as is ibogaine, the main alkaloid of a shrub used in Central Africa to induce NDEs in a religious context. Ibogaine can also elicit different experiences when used in a hallucinatory context or in initiatic rituals, where a superficial state of coma is induced. These data raise the question of whether the chemically-induced NDE-like experience is related to the use of a particular kind of substance or to a genuine comatose state.     

The ‘frame’ as a container for the erotic transference – A case study

Abstract

This paper discusses various aspects of the psychotherapeutic frame, and explores the importance of maintaining the boundaries of the frame especially when an erotic transferential relationship is present. Many now agree that erotic transference and counter-transference occur in most therapeutic relationships, and yet it is something that therapists often struggle to work with effectively. The author acknowledges her own difficulties in working with erotic transferences and demonstrates why the adherence to the frame is especially significant in these circumstances. A case study is used to illustrate the difficulties of working with the erotic transference within the constructs of a frame and short-term therapy, and how the author's own counter-transference affected the therapy as well as how this was dealt with in supervision.     

The HEXACO–60: A Short Measure of the Major Dimensions of Personality

According to Jung anima and animus are functions, themselves largely unconscious, mediating between the ego and the deeper unconscious. Their manifestations in projection (also in dream, myth, etc.) are called the soul image. The soul image and the functions which it represents usually have sexual characteristics contrary to those of the conscious personality and are compensatory and complementary thereto.

Kinaesthetic responses in the Rorschach test are generally regarded as carriers of projections from the unconscious. Therefore, when personality imbalance and increased liability to projection occur as in neurosis, the proportion of contrasexual Ms should be larger in neurotic than in normal groups. Using four groups containing each 100 adult subjects: healthy women, neurotic women, healthy men and neurotic men, the hypothesis was tested and confirmed, affording some confirmation to Jungian theory.     

The action–trait theory of motivation: A commentary on Roy F. Baumeister’s 2014 address to the Society for the Study of Motivation

Roy F. Baumeister’s 2014 presidential address to the Society for the Study of Motivation was a call to motivation scientists to address the lack of a grand theory of motivation and to encourage them to begin working on one. This commentary addresses some of the requirements of such a theory and discusses the relatively new action–trait theory of motivation as a viable candidate for such a grand theory of motivation. Action–trait theory is based on historic “purposive psychology” and incorporates the methods of individual differences psychology. It can be represented in eight falsifiable hypotheses, three of which have already received empirical support.     

Between the Horns: A Dilemma in the Interpretation of the Running of the Bulls–Part 2: The Evasion

This second part of the essay deals with the horns of the dilemma at the conceptual level and ‘on the street’. The first part ended with that quandary where a deep understanding was precluded no matter which way one turned, whether an inadequate comprehension based on individual and partial notions, a perplexing pluralist path or a relinquishment of the hermeneutic enterprise altogether. The philosophical solution of existential overtones presently put forward deftly avoids the sharp ends of the predicament by means of a three-tiered phenomenological analysis of the event. First, death is considered via Heidegger's and Sartre's existential examination; next, risk and related concepts, such as fear, are scrutinised; and third, Nietzsche's and Ortega y Gasset's life-affirming views lead us to the liberating conclusion: facing danger and death are means to an enhanced and joyful experience of life. As in the first part, this one also presents several photographs that complement the text at different levels. Once several objections are disposed of, readers are left with a philosophical elucidation of a sense of joy predicated on the ability to face daring challenges willingly undertaken for the fun of it.     

Effects of an early intervention on maternal post-traumatic stress symptoms and the quality of mother–infant interaction: The case of preterm birth

Preterm birth may represent a traumatic situation for both parents and a stressful situation for the infant, potentially leading to difficulties in mother–infant relationships. This study aimed to investigate the impact of an early intervention on maternal posttraumatic stress symptoms, and on the quality of mother–infant interactions, in a sample of very preterm infants and their mothers. Half of the very preterm infants involved in the study (n = 26) were randomly assigned to a 3-step early intervention program (at 33 and 42 weeks after conception and at 4 months’ corrected age). Both groups of preterm infants (with and without intervention) were compared to a group of full-term infants. The impact of the intervention on maternal posttraumatic stress symptoms was assessed 42 weeks after conception and when the infants were 4 and 12 months of age. The impact of the intervention on the quality of mother–infant interactions was assessed when the infants were 4 months old. Results showed a lowering of mothers’ posttraumatic stress symptoms between 42 weeks and 12 months in the group of preterm infants who received the intervention. Moreover, an enhancement in maternal sensitivity and infant cooperation during interactions was found at 4 months in the group with intervention. In the case of a preterm birth, an early intervention aimed at enhancing the quality of the mother–infant relationship can help to alleviate maternal post-traumatic stress symptoms and may have a positive impact on the quality of mother–infant interactions.     

A social host in the machine? The case of group attention

I argue that akin to mind-body dualism, social-mental dualism is open to critique. That is, mental processes can be inherently social, with sociality ‘baked into’ the architecture of the cognitive mechanism. As a case in point, I introduce the reader to the cognitive mechanism of group attention. In particular, I focus on the differences between group attention and ideomotor imitation in terms of their (a) compliance to the social-mental dichotomy, and (b) contributions to building common knowledge—a prerequisite for human communication and collective action. Finally, I suggest possible implications of group attention scholarship for other social memory phenomena such as social contagion, socially shared memory-induced forgetting, and the saying-is-believing effect.     

The Urdu translation of the Sahin–Francis Scale of Attitude toward Islam: A case of using only positive valence items in Pakistan

The present aim was to develop an Urdu translation of the Sahin–Francis Scale of Attitude toward Islam as a first step toward establishing a coherent research programme examining the mental health correlates of religiosity within an Islamic cultural setting, that of Pakistan. Matters raised during the translation process into Urdu are described, resulting in the development of a measure that was culturally appropriate for use in Pakistan that contained only positive valence items. To assess the cross language validity and internal reliability of the measure, 174 Pakistani university students were administered both the Urdu and the adapted English version of the measure. After two weeks, to assess the temporal stability of the measure, a subsample of 20 university students completed the Urdu version of the measure. A satisfactory level of internal reliability, temporal stability, and construct validity was found for the measure. Suggestions for further research with the Urdu translation of the Sahin–Francis Scale of Attitude toward Islam were provided.     

The Ethics of Neuroscience and the Neuroscience of Ethics: A Phenomenological–Existential Approach

Advances in the neurosciences have many implications for a collective understanding of what it means to be human, in particular, notions of the self, the concept of volition or agency, questions of individual responsibility, and the phenomenology of consciousness. As the ability to peer directly into the brain is scientifically honed, and conscious states can be correlated with patterns of neural processing, an easy??but premature??leap is to postulate a one-way, brain-based determinism. That leap is problematic, however, and emerging findings in neuroscience can even be seen as compatible with some of the basic tenets of existentialism. Given the compelling authority of modern ??science,?? it is especially important to question how the findings of neuroscience are framed, and how the articulation of research results challenge or change individuals?? perceptions of themselves. Context plays an essential role in the emergence of human identity and in the sculpting of the human brain; for example, even a lack of stimuli (??nothing??) can lead to substantial consequences for brain, behavior, and experience. Conversely, advances in understanding the brain might contribute to more precise definitions of what it means to be human, including definitions of appropriate social and moral behavior. Put another way, the issue is not simply the ethics involved in framing neurotechnology, but also the incorporation of neuroscientific findings into a richer understanding of human ethical (and existential) functioning.     

The Effect of Response Bias on the Personality Inventory for DSM–5 (PID–5)

Valid self-report assessment of psychopathology relies on accurate and credible responses to test questions. There are some individuals who, in certain assessment contexts, cannot or choose not to answer in a manner typically representative of their traits or symptoms. This is referred to, most broadly, as test response bias. In this investigation, we explore the effect of response bias on the Personality Inventory for DSM–5 (PID–5; Krueger, Derringer, Markon, Watson, & Skodol, 2013 Krueger, R. F., Derringer, J., Markon, K. E., Watson, D., & Skodol, A. E. (2013). The Personality Inventory for DSM–5 (PID–5)–Adult (Full version). Washington, DC: American Psychiatric Association. [Google Scholar]), a self-report instrument designed to assess the pathological personality traits used to inform diagnosis of the personality disorders in Section III of DSM–5. A set of Minnesota Multiphasic Personality Inventory Restructured Form (MMPI–2–RF; Ben-Porath & Tellegen, 2008 Tellegen, A., & Ben-Porath, Y. S (2008). MMPI–2–RF technical manual. Minneapolis: University of Minnesota Press. [Google Scholar]/2011 Ben-Porath, Y. S., & Tellegen, A. (2011). MMPI–2–RF manual for administration, scoring, and interpretation. Minneapolis: University of Minnesota Press. (Original work published 2008) [Google Scholar]) validity scales, which are used to assess and identify response bias, were employed to identify individuals who engaged in either noncredible overreporting (OR) or underreporting (UR), or who were deemed to be reporting or responding to the items in a “credible” manner—credible responding (CR). A total of 2,022 research participants (1,587 students, 435 psychiatric patients) completed the MMPI–2–RF and PID–5; following protocol screening, these participants were classified into OR, UR, or CR response groups based on MMPI–2–RF validity scale scores. Groups of students and patients in the OR group scored significantly higher on the PID–5 than those students and patients in the CR group, whereas those in the UR group scored significantly lower than those in the CR group. Although future research is needed to explore the effects of response bias on the PID–5, results from this investigation provide initial evidence suggesting that response bias influences scale elevations on this instrument.     

The Influence of Social Regard on the Customer–Service Firm Relationship: The Moderating Role of Length of Relationship

Purpose  

The authors examine the influence of employees’ social regard toward the customers on customer satisfaction, trust, and word of mouth. In addition, we analyzed the moderating role of length of relationship between the service provider and the customer on the effects of social regard on the customer relationship outcomes.     

The influence of verbal labeling on the perception of odors: evidence for olfactory illusions?

Using the definition that an illusion is observed when a stimulus is invariant but context alters its perception, we examined whether verbal context could produce olfactory illusions. To test this effect, we chose five odors with minimally fixed sources and that could be interpreted with various hedonic connotations. The odors were violet leaf, patchouli, pine oil, menthol, and a 1:1 mixture of isovaleric and butyric acids. Subjects individually sniffed each odor at two different sessions separated by one week. At each session an odor was given a different verbal label (either positive or negative) and subjects rated the odors on several hedonic scales and provided perceptual and interpretative responses to them. Results showed that the perception of an odor could be significantly influenced by the label provided for it. We propose that the cases where verbal labels inverted odor perception are the first empirical demonstrations of olfactory illusions.