Individual differences in metacontrast: An impetus for clearly specified new research objectives in studying masking and perceptual awareness?

While the majority of perceptual phenomena based research on consciousness is implicitly nomothetic, some idiographic perspective can be sometimes highly valuable for it. It may turn out that after having had a closer look at individual differences in the expression of psychometric functions a need to revise some nomothetic laws considered as the general ones arises as well. A study of individual differences in metacontrast masking published in this issue superbly illustrates this. A myriad of urgent research objectives emerges out of this study, most of them important both for clearing up the still messy theoretical picture on visual masking and for the beginning of asking whether perceptual awareness mechanisms are so universal at all. In this commentary the problems pertinent to this issue are discussed.     

Mapping the structure of perceptual and visual–motor abilities in healthy young adults

The ability to quickly detect and respond to visual stimuli in the environment is critical to many human activities. While such perceptual and visual–motor skills are important in a myriad of contexts, considerable variability exists between individuals in these abilities. To better understand the sources of this variability, we assessed perceptual and visual–motor skills in a large sample of 230 healthy individuals via the Nike SPARQ Sensory Station, and compared variability in their behavioral performance to demographic, state, sleep and consumption characteristics. Dimension reduction and regression analyses indicated three underlying factors: Visual–Motor Control, Visual Sensitivity, and Eye Quickness, which accounted for roughly half of the overall population variance in performance on this battery. Inter-individual variability in Visual–Motor Control was correlated with gender and circadian patters such that performance on this factor was better for males and for those who had been awake for a longer period of time before assessment. The current findings indicate that abilities involving coordinated hand movements in response to stimuli are subject to greater individual variability, while visual sensitivity and occulomotor control are largely stable across individuals.     

The ear’s versus the eye’s potential to assess characteristics of numeric data: Are we too visuocentric?

A single experiment studied how effectively information about the central tendency, variability, and shape of numeric data distributions could be conveyed to statistically knowledgeable subjects. The data were summarized by visual histograms, auditory histograms that coded numeric value as pitch on the musical scale, and five-note auditory analogues of a box-whisker display that coded the minimum, quartile, and maximum scores as musical notes. Regression and multidimensional scaling analysis of judgments of dissimilarity between distributions showed that auditory depiction provides a highly effective means of conveying information about distributional characteristies. Auditory depicition may be a useful alternative to traditional visual graphics.     

Hand–foot motor priming in the presence of temporary inability to use hands

To verify if the link between observed hand actions and executed foot actions found in aplasics is essentially induced by the constant use of foot substituting the hand, we investigated if the vision of a grasping hand is able to prime a foot response in normals. Participants were required to detect the time-to-contact of a hand grasping an object either with a suitable or a less suitable movement, an experimental paradigm known to induce a priming effect. Participants responded either with the hand or the foot, while having free or bound hands. Results showed that for hand responses motor priming effect was stronger when the hands were free, whereas for foot responses it was stronger when the hands were bound. These data are interpreted as a further evidence that a difficulty to move affects specific cognitive functions and that the vision of a grasping hand may prime a foot response.     

A review of the concurrent-chains arrangement to assess intervention choice: 2018–2023

The purpose of this review is to summarize recent literature on the use of concurrent-chains arrangements in the assessment of preference for interventions (or intervention components) in the applied literature. The types of interventions and participants are described briefly, and procedural variations, ethical considerations, and recommendations for future research are discussed.     

Articulatory suppression and the irrelevantspeech effect in short-term memory: Does the locus of suppression matter?

Immediate serial recall for letter sequences was impaired when irrelevant speech (IS) was presented throughout stimulus input and a subsequent rehearsal interval. This irrelevant-speech effect was eliminated when participants engaged in articulatory suppression (repeated articulation of one or more digits) during stimulus input but not when suppression occurred during the postinput rehearsal period. Also, changing-state suppression (articulation of multiple items) impaired the overall level of performance more than did steady-state suppression (repetition of a single item), whereas both forms of suppression had the same influence on the IS effect. Our results suggest that the locus of suppression (during or after stimulus input) may have contributed to discrepant findings in the prior literature regarding the influence of articulatory suppression on the IS effect. We consider the implications of our findings for three prominent models of immediate memory: the working memory model, the objectoriented episodic record model, and the feature model.     

On the role of lyrics in the music–exercise performance relationship

ObjectivesTo examine the role of lyrics on a range of psychological, psychophysical, and physiological variables during submaximal cycling ergometry.DesignWithin-subject counterbalanced design.MethodTwenty-five participants performed three 6-min cycling trials at a power output corresponding to 75% of their maximum heart rate under conditions of music with lyrics, same music without lyrics, and a no-music control. Cycling cadence, heart rate, and perceived exertion were recorded at 2-min intervals during each trial. Positive and negative affect was assessed before and after each trial.ResultsParticipants cycled at a higher cadence towards the end of the cycling trials under music with lyrics. Main effects were found for perceived exertion and heart rate, both of which increased from min 2 through to min 6, and for affect: positive affect increased and negative affect decreased from pre- to post-trials.ConclusionsParticipants pedalled faster in both music conditions (with and without lyrics) while perceived exertion and heart rate did not differ. The inclusion of lyrics influenced cycling cadence only at min 6 and had no effect on the remaining dependent variables throughout the duration of the cycling trials. The impact of lyrical content in the music–exercise performance relationship warrants further attention in order for us to better understand its role.     

Inhibition of evaluative and perceptual odour–taste learning by attention to the stimulus elements

Pairing of odours and tastes in solution results in the odour taking on the taste's hedonic and perceptual properties. Theoretical accounts of such conditioning propose that the stimulus elements form a configuration with hedonic and/or perceptual properties. One implication of this account is that configural binding may be inhibited by allocation of attention to the individual elements during conditioning (analytical attention). This was tested here by training participants to attend analytically or synthetically during pairing of odours with either sucrose or water. Differential conditioning effects for sucrose- and water-paired odours were seen only in the synthetic group, with sucrose-paired odours increasing in both smelled sweetness and liking. These data support configural models as explanations for these forms of associative learning and emphasize the role of top-down processes in mediating transfer of perceptual and hedonic properties from tastes to odours.     

On the notions of indiscernibility and indeterminacy in the light of the Galois–Grothendieck theory

We analyze the notions of indiscernibility and indeterminacy in the light of the Galois theory of field extensions and the generalization to \(K\) -algebras proposed by Grothendieck. Grothendieck’s reformulation of Galois theory permits to recast the Galois correspondence between symmetry groups and invariants as a Galois–Grothendieck duality between \(G\) -spaces and the minimal observable algebras that discern (or separate) their points. According to the natural epistemic interpretation of the original Galois theory, the possible \(K\) -indiscernibilities between the roots of a polynomial \(p(x)\in K[x]\) result from the limitations of the field \(K\) . We discuss the relation between this epistemic interpretation of the Galois–Grothendieck duality and Leibniz’s principle of the identity of indiscernibles. We then use the conceptual framework provided by Klein’s Erlangen program to propose an alternative ontologic interpretation of this duality. The Galoisian symmetries are now interpreted in terms of the automorphisms of the symmetric geometric figures that can be placed in a background Klein geometry. According to this interpretation, the Galois–Grothendieck duality encodes the compatibility condition between geometric figures endowed with groups of automorphisms and the ‘observables’ that can be consistently evaluated at such figures. In this conceptual framework, the Galoisian symmetries do not encode the epistemic indiscernibility between individuals, but rather the intrinsic indeterminacy in the pointwise localization of the figures with respect to the background Klein geometry.     

Qualities of reflection: using Saul’s (2001) On Equilibrium to restore humanity to reflection in healthcare

Reflection features strongly in health and care work as a tool for personal and professional development and can support us as practitioners to be critical and self-aware in practice, of practice and the impact on clients and patients. Its power to transform learning and practice, however, has been watered down through recipe-following in reflective recording and through the avoidance of recording uncertainty or practice that might not measure against professional codes. Drawing on the humanist philosophy of John Ralston Saul, I suggest using Saul’s ‘six qualities’ as themes for reflective questions. I reflect on the influence of reason through codes of practice and offer suggestions for questions to restore an awareness of Self in work with clients and patients. Finally, from my experience as a counselling student and healthcare educator, I argue that we should have a greater appreciation of the power of uncertainty in reflective recording.     

Coparenting in the Context of Mother–Father–Infant versus Mother–Grandmother–Infant Triangular Interactions in Turkey

In this report, coparenting behaviors during triangular interactions among families raising a 3-month-old infant in Turkey are examined. Given the significant role played by extended family members in Turkish culture, coparenting dynamics were examined as mothers and babies played together with grandmothers, as well as together with fathers. Forty-five families took part, and 42 father–mother–baby and 33 grandmother–mother–baby triangular interactions of approximately 10?min in length were filmed during the Lausanne Trilogue Play. From videotapes of the interactions, individual and mutual coparenting behaviors were evaluated using the Coparenting and Family Rating System: 3 Month Adaptation (CFRS3M). Results indicated that while mothers’ own parenting behavior when in the LTP role of Active Parent (AP) was comparable whether with fathers or grandmothers, their behavior when in the LTP role of third party parent (TPP) was comparatively more engaged while with fathers than while with grandmothers. Fathers were comparatively less engaged when occupying the TPP role than were mothers in the TPP role, while grandmothers showed more flirting and distracting behavior in the TPP role than did either fathers or mothers. These findings are significant in documenting meaningful distinctions in Turkish grandmothers’ as well as in Turkish fathers’ and mothers’ coparenting propensities when engaging in triangular interactions with babies during the LTP.     

Residents’ reactions to environmental stressors in Kathmandu: A Comparison of the inner city versus the outskirts

Residents of eight different locations in Kathmandu, four in the inner city and four on the outskirts, were interviewed about environmental stressors, mental distress, and physical symptoms. There were significant gender and location differences on all three measures. Compared to men, women reported more mental distress and more physical symptoms, but fewer environmental stressors. Compared to residents of the inner city, residents of the outskirts reported more mental distress, more physical symptoms, and fewer environmental stressors. Environmental stressors were linked to mental distress among residents in the outskirts but were not linked to mental distress among residents in the inner city. Results suggested that residents’ belief in perceived control of their lives by God partially explained this effect.     

Recognition of Difference in the Author–Discussant Relation: Reply to Commentary

This author describes how poetry infuses her way of thinking, feeling, and writing and her way of working analytically. She introduces the concept of a nonanalytic third—the analyst's personal, intimate, and substantially abiding relationship to some body of experience unrelated to materia psychoanalytica. She posits that this nonanalytic third, the nature of which is unique to each analyst, constitutes a source of enrichment, texture, and dimensionality as well as personally compelling metaphors that the analyst may offer to the patient as other-than-me substance and a placeholder for cultivating the potential in the discourse of analytic potential space, in addition to serving as a facilitator and comfort for transition when the analyst must recognize and promote the necessary ending of an intimate analytic relationship.

Using Stephen Mitchell's notions of intersubjectivity and also using the analyst's and patient's separate role responsibilities in the creation of a context for the absence of conscious intentions, the author develops her concept of the nonanalytic third and the particular contribution of poetry to clinical process. These ideas are illustrated with a detailed case example of an unfolding analytic process that includes an e-mail exchange at the time when a shocking form of nonanalytic third appeared—September 11, 2001.     

A lifespan perspective on semantic processing of concrete concepts: does a sensory/motor model have the potential to bridge the gap?

Research regarding semantic knowledge of objects is often conducted independently in children and adults. Review of these bodies of evidence suggests that the two literatures are often complementary. It seems critical to determine what we can learn from a developmental perspective, toward the common goal of understanding semantic organization. Here we focus on the proposal that semantic knowledge about concrete concepts may be built on the foundation of sensory/motor processes. In particular, we focus on a moderate formulation of this viewpoint, the sensory/motor model of semantic representations of objects (e.g., Gainotti 2007; Martin 2007), which has been examined utilizing behavioral, neuroimaging, and neuropsychological evidence. Taken together, behavioral and neuroimaging studies with infants, older children, and adults have suggested that patterns laid down in early childhood remain salient throughout the lifespan and may also predict patterns of deficit that emerge following brain injury.     

Artificial grammar learning in children: abstraction of rules or sensitivity to perceptual features?

We examined sensitivity to grammatical sequences of colors in an artificial grammar learning task in a sample of 120 children aged between 5 and 8 years. The aim of the experiment was to test whether the children would preferentially learn the specific salient features of the items they were exposed to or the rules that generated these items. The children were divided into two experimental groups (identical grammar but training items differing in their surface features) and a control group (random items). The results showed that regardless of age, participants learned the most frequent salient features of the items, as well as some kind of abstract relational information. However, the 8-year-olds presented a more complex result profile, with one of the experimental groups apparently developing sensitivity to grammatical rules. These results are discussed with reference to the main current models of implicit learning. Overall, the results provided more support for stimulus-specific processing models than for rule-based models.     

Fine motor skill proficiency in typically developing children: On or off the maturation track?

Fine motor skill proficiency is an essential component of numerous daily living activities such as dressing, feeding or playing. Poor fine motor skills can lead to difficulties in academic achievement, increased anxiety and poor self-esteem. Recent findings have shown that children’s gross motor skill proficiency tends to fall below established developmental norms. A question remains: do fine motor skill proficiency levels also fall below developmental norms? The aim of this study was to examine the current level of fine motor skill in Irish children. Children (N = 253) from 2nd, 4th and 6th grades (mean age = 7.12, 9.11 and 11.02 respectively) completed the Fine Motor Composite of the Bruininks Oseretsky Test of Motor Proficiency 2nd Edition (BOT-2). Analysis revealed that only 2nd grade children met the expected level of fine motor skill proficiency. It was also found that despite children’s raw scores improving with age, children’s fine motor skill proficiency was not progressing at the expected rate given by normative data. This leads us to question the role and impact of modern society on fine motor skills development over the past number of decades.     

Order of acquisition in learning perceptual categories: A laboratory analogue of the age-of-acquisition effect?

In the age-of-acquisition (AoA) effect, an advantage for recognition and production is found for items learned early in life, as compared with items learned later. In this laboratory analogue, participants learned to categorize novel random checkerboard stimuli. Some stimuli were presented from the onset of training; others were introduced later. At test, when early and late stimuli had equal cumulative frequency, early stimuli were classified significantly more quickly. Because stimuli were randomly assigned to be introduced either early or late, we can conclude that early stimuli were categorized more quickly because of their order of acquisition. This finding suggests that age- or order-of-acquisition effects are a general property of any learning system.     

Using scissors to bisect a line: A perception–action dissociation in complex tool use

Previous research has shown that unilateral visual neglect is improved when patients are required to actively grasp an object at its center, rather than only pointing to its center. A similar dissociation between pointing and grasping responses has been reported for pseudoneglect, a spatial bias toward the left side of space that is normally exhibited by healthy participants. Among other theories, the two-visual-streams hypothesis has been offered as an explanation for these dissociations. According to this hypothesis, highly practiced actions that are performed under easily available visual input (e.g., grasping an object) are controlled by the dorsal stream and can resist perceptual judgment biases. We investigated whether, in pseudoneglect, dissociations between perceptual judgments and motor–manipulative responses occur when participants have to respond with complex tools that are highly practiced but that have been shown to rely on both ventral- and dorsal-stream processing. In a standard line bisection task, participants had to either mark the center of a line with a pencil or cut the line in two halves using a pair of scissors. The results indicated the typical leftward bias (pseudoneglect) in the pencil task, whereas performance was much more accurate in the scissors task. These results show that actions featuring complex tool use can resist perceptual judgment biases, and the findings are discussed with reference to existing accounts of perception–action dissociations.