Discrimination of painting style and quality: pigeons use different strategies for different tasks

Birds have visual cognition as well developed as humans. Sometimes, the birds show visual discrimination similar to humans, but the birds may use different cues. Previous reports suggest that global configuration cues are salient for humans, whereas local elemental cues are salient for pigeons. I analyzed the discriminative behavior of pigeons with scrambled images because scrambled images keep the local elemental cues of the original images but lose the global configuration cues. If pigeons use local elemental cues, then, they should show transfer of discrimination from the original images to their scrambled images and also transfer from the scrambled images to their original images. In Experiment I, I trained pigeons on painting style discrimination (Japanese paintings vs. Western impressionist paintings) using either the original or scrambled images and found that the pigeons showed bidirectional transfer. In Experiment II, I trained pigeons on discrimination of “good” versus “bad” paintings using children’s paintings. The birds showed poor transfer from the original images to their scrambled images and vise versa. Thus, the pigeons discriminated good and bad paintings based mostly on global configuration cues in this case. These results suggest that the pigeons use different cues for different discriminations.     

Vision of a pictorial hand modulates visual-tactile interactions

The participants in this study discriminated the position of tactile target stimuli presented at the tip or the base of the forefinger of one of the participants’ hands, while ignoring visual distractor stimuli. The visual distractor stimuli were presented from two circles on a display aligned with the tactile targets in Experiment 1 or orthogonal to them in Experiment 2. Tactile discrimination performance was slower and less accurate when the visual distractor stimuli were presented from incongruent locations relative to the tactile target stimuli (e.g., tactile target at the base of the finger with top visual distractor) highlighting a cross-modal congruency effect. We examined whether the presence and orientation of a simple line drawing of a hand, which was superimposed on the visual distractor stimuli, would modulate the cross-modal congruency effects. When the tactile targets and the visual distractors were spatially aligned, the modulatory effects of the hand picture were small (Experiment 1). However, when they were spatially misaligned, the effects were much larger, and the direction of the cross-modal congruency effects changed in accordance with the orientation of the picture of the hand, as if the hand picture corresponded to the participants’ own stimulated hand (Experiment 2). The results suggest that the two-dimensional picture of a hand can modulate processes maintaining our internal body representation. We also observed that the cross-modal congruency effects were influenced by the postures of the stimulated and the responding hands. These results reveal the complex nature of spatial interactions among vision, touch, and proprioception.     

Discrimination of “Four” and “Two” by Pigeons

The Psychological Record - Two pigeons learned to respond to four objects while withholding response to two objects. The birds maintained their numerical discrimination when new objects were...     

The effects of mothers' teasing: Do Japanese infants read their mothers' play intention in teasing?

The focus of this study was whether an infant can understand the playful intention in the mother's teasing behaviour. The mother's teasing behaviour can elicit playful interaction with the infant on the one hand, or can result in the infant's distress. In other words, teasing may function as the turning-point in mother-infant interaction. Thus it was hypothesized that the consequence of mothers' teasing behaviour would be positive or negative depending on the success or failure in communication of both mothers' play intention with play signs and infants' interpretation of the play signs. Subjects were 20 mothers and their infants aged from 10 to 13 months (M = 11 months) who were observed during 10 minutes of free play with toys that evoke minor surprise and/or fearfulness. Results showed that about one-third of mothers' teasing behaviour elicited the infant's enjoyment. Especially, mothers' playful teasing accompanied by a smile or laugh led most successfully to infant enjoyment. In contrast, mothers' pretence teasing elicited no particular response from infants. These data suggest that around their first birthday infants develop some understanding of the play intention latent in mothers' teasing behaviour.     

The Relationship Between Client Emotional Expressions, Therapist Interventions, and the Working Alliance: An Exploration of Eight Emotional Expression Events

The relationship between client emotional expression and therapist interventions was studied in two working alliance conditions. An events-focused methodology was used to examine a total of 8 events taken from a variety of therapeutic orientations. Results indicated that, in the presence of a good client–therapist relationship, therapists showed higher levels of empathy and effectively focused on the immediately expressed feelings; in turn, their clients were engaged in exploration of feelings. In poor-relationship dyads, clients expressed negative feelings toward the therapists. Interventions rated as effective by clinical judges were characterized by accurate therapist understanding of clients' emotional expressions and working with strains in the therapeutic relationship. Ineffective interventions were associated with inaccurate assessments of clients' emotional states. Intensive analysis of these sessions led to three distinct models of in-session emotional expression events. Theoretical and practical implications of these models will be discussed.     

Brain activation during the course of sentence comprehension

The purpose of this study is to determine, by functional magnetic resonance imaging, how the activated regions of the brain change as a Japanese sentence is presented in a grammatically correct order. In this study, we presented constituents of a sentence to Japanese participants one by one at regular intervals. The results showed that the left lingual gyrus was significantly activated at the beginning of the sentence, then the left inferior frontal gyrus and left supplementary motor area, in the middle of the sentence, and the left inferior temporal gyrus, at the end of the sentence. We suggest that these brain areas are involved in sentence comprehension in this temporal order.     

Left-side dominance for song discrimination in Bengalese finches (Lonchura striata var. domestica)

Male Bengalese finches are left-side dominant for the motor control of song in the sensorimotor nucleus (the high vocal center, or HVc) of the telencephalon. We examined whether perceptual discrimination of songs might also be lateralized in this species. Twelve male Bengalese finches were trained by operant conditioning to discriminate between a Bengalese finch song and a zebra finch song. Before training, the left HVc was lesioned in four birds and the right HVc was lesioned in four other birds. The remaining four birds were used as controls without surgery. Birds with a left HVc lesion required significantly more time to learn to discriminate between the two songs than did birds with a right HVc lesion or intact control birds. These results suggest that the left HVc is not only dominant for the motor control of song, but also for the perceptual discrimination of song. Accepted after revision: 11 September 2001 Electronic Publication     

Assessing the influence of schematic drawings of body parts on tactile discrimination performance using the crossmodal congruency task

Seeing one's own body (either directly or indirectly) can influence visuotactile crossmodal interactions. Recently, it has been shown that even viewing a simple line drawing of a hand can also modulate such crossmodal interactions, as if the picture of the hand somehow corresponds to (or primes) the participants' own hand. Alternatively, however, it could be argued that the modulatory effects of viewing the picture of a hand on visuotactile interactions might simply be attributed to cognitive processes such as the semantic referral to the relevant body part or to the orientation cues provided by the hand picture instead. In the present study, we evaluated these various different interpretations of the hand picture effect. Participants made speeded discrimination responses to the location of brief vibrotactile targets presented to either the tip or base of their forefinger, while trying to ignore simultaneously-presented visual distractors presented to either side of central fixation. We compared the modulatory effect of the picture of a hand with that seen when the visual distractors were presented next to words describing the tip and base of the forefinger (Experiment 1), or were superimposed over arrows which provided another kind of directional cue (Experiment 2). Tactile discrimination performance was modulated in the hand picture condition, but not in the word or arrow conditions. These results therefore suggest that visuotactile interactions are specifically modulated by the image of the hand rather than by cognitive cues such as simply semantic referral to the relevant body sites and/or any visual orientation cues provided by the picture of a hand.     

Tensile properties of precracked tempered martensitic steel specimens tested at ultralow strain rates in high-pressure hydrogen atmosphere

Tensile tests were performed on precracked Cr–Mo martensitic steel (C: 0.38, Si: 0.22, Mn: 0.84, P: 0.024, S: 0.021, Ni: 0.08, Cr: 1.11, Mo: 0.15, Cu: 0.12, Fe: bal. (wt%)) specimens at various strain rates (ranging from 6.5 × 10^?8 s^?1 to 1.0 × 10^?4 s^?1) in high-pressure (95 MPa) hydrogen and helium atmospheres. Irrespective of the strain rate, the tensile strength in the helium atmosphere was 1400 MPa. In the hydrogen atmosphere, the tensile strength decreased to less than 600 MPa at a strain rate of 2.0 × 10^?5 s^?1. However, the tensile strength increased to 900 MPa when the strain rate was decreased to 6.5 × 10^?8 s^?1. This recovery of the tensile strength was because of the decrease in the local stress in the vicinity of the precrack because of hydrogen.     

Learning and difficult experiences in graduate training in clinical psychology: A qualitative study of Japanese trainees’ retrospective accounts

This study examined the experiences of Japanese clinical psychology trainees in their graduate school with the aim of identifying factors that might enhance or hinder their learning and professional development. We analyzed the interview data obtained from 17 clinical psychologists using grounded theory approach. Two major category groups were generated: Developing as a Clinician and Difficulties. The primary positive learning experiences in Developing as a Clinician were labeled “Hot Learning,” in which trainees acquired professional knowledge and skills through close interpersonal engagement with clients, peers, faculty, and supervisors. In contrast, Difficulties involved trainees’ negative experiences resulting in feelings of self-doubt and incompetence. These experiences occurred in close but sometimes conflicted interpersonal contexts, where trainees felt evaluated in a manner incommensurate with the support they received. We found that the quality of interpersonal relationships, which provided the context for optimal learning for trainees, was paramount to the definition of positive versus difficult learning experiences. Implications for therapist training, professional development and future research are discussed.