Effects of Three Experimental Conditions on Preschool Children's Ability to Coordinate Visual Perspectives

1983 ◽  
Vol 56 (2) ◽  
pp. 675-678 ◽  
Author(s):  
Dominic F. Gullo ◽  
Carol Bersani
Keyword(s):  
Visual Cues ◽  
Age Groups ◽  
Age Effect ◽  
Object Identification ◽  
Age Effects ◽  
The Other ◽  
Cognitive Demands ◽  
Experimental Conditions

60 3-, 4-, and 5-yr.-old children were asked to coordinate visual perspectives in three conditions: (1) Piaget and Inhelder's “Three Mountain Task,” (2) identify objects a doll could see against the side of two intersecting walls, and (3) choose a picture which represented which objects the doll could see. Both condition and age effects were significant. For all age groups there were significant differences between the “Three Mountain Task” and the other two tasks, with significantly more children responding correctly on the two object-identification conditions. No significant differences between the two object-identification conditions were found. While 5-yr.-olds performed significantly better on both object-identification conditions, no differences were found between the 3- and 4-yr.-olds on these tasks. No age effect was found on the “Three Mountain Task.” Children of all groups found this task too difficult. 3-, 4-, and 5-yr.-olds seem better at coordinating visual perspectives than suggested earlier. Greater success on present tasks may be due to the reduced number of visual cues that represented alternate visual perspectives. Differences in cognitive demands of each condition were analyzed.

scholarly journals Bidirectional Interference Between Simulated Driving and Speaking

2019 ◽  
Vol 62 (7) ◽  
pp. 2053-2064
Author(s):  
Christopher Dromey ◽  
Kelsey Simmons
Keyword(s):  
Divided Attention ◽  
Age Groups ◽  
Age Effect ◽  
Driving Performance ◽  
The Other ◽  
Steering Wheel ◽  
Experimental Conditions ◽  
Simulated Driving ◽  
Acoustic Measures ◽  
Lane Position

Purpose This study relied on acoustic measures of connected speech and several indices of driving performance to quantify interference between speaking and simulated driving. Method Three groups of 20 younger (ages 20–30 years), middle-age (ages 40–50 years), and older (ages 60–71 years) adults produced monologues and completed a simulated driving task, which involved maintaining a constant speed and lane position on a freeway. Both tasks were completed separately and concurrently. Results There were significant divided attention effects, with a reduced speaking time ratio, and increases in vocal intensity, speed variability, and steering wheel adjustments. There was a significant between-subjects age effect for intensity and fundamental frequency as the younger group had less variation with these variables compared to the other age groups across conditions. There was a significant between-subjects age effect for lane position, steering wheel position, and speed as the younger group had less variation in lane position compared to the other 2 groups, and the older group had more variation in speed and steering wheel position compared to the other 2 groups across the experimental conditions. Conclusion These findings reveal that divided attention conditions can impact both speech and simulated driving performance. The results also shed some light on the effects of age on speech and driving tasks, although the degree of interference from divided attention did not differ by age.

scholarly journals The Influence of Relative Age Effects on the Cardiorespiratory Fitness Levels of Children Age 9 to 10 and 11 to 12 Years of Age

2012 ◽  
Vol 24 (1) ◽  
pp. 72-83 ◽  
Author(s):  
Simon J. Roberts ◽  
Lynne M. Boddy ◽  
Stuart J. Fairclough ◽  
Gareth Stratton
Keyword(s):  
Cardiorespiratory Fitness ◽  
Age Groups ◽  
Age Effect ◽  
Age Effects ◽  
Fitness Testing ◽  
Public Health Perspective ◽  
Cross Sectional ◽  
Relative Age ◽  
Relative Age Effect ◽  
First Time

The aims of this study were firstly to examine whether there was an observed relative age effect in the cardiorespiratory fitness scores of 9-10 and 11-12 year old children, and secondly whether any observed effect was maintained after controlling for somatic maturity. Cardiorespiratory fitness data from 11,404 children aged 9-10 years and 3,911 children aged 11-12 years were obtained from a large cross-sectional field-based fitness testing program. A one-way ANOVA revealed a statistically significant relative age effect (p < .01) existed in the 20mSRT scores across all the age groups. Furthermore, ANCOVA analyses identified a statistically significant relative age effect was maintained after controlling for somatic maturation (p < .05). From a public health perspective these results confirm the existence of relative age effects for the first time and consequently may hold implications for relatively younger children in the accurate assessment of their cardiorespiratory fitness scores.

The Effect of Reduced Spatial Cues on the Learning of Successive Visual Reversals

1974 ◽  
Vol 26 (2) ◽  
pp. 196-205 ◽  
Author(s):  
A. H. Winefield
Keyword(s):  
Visual Cues ◽  
Brightness Discrimination ◽  
Spatial Position ◽  
The Other ◽  
Spatial Cues ◽  
Experimental Conditions ◽  
Successive Reversal ◽  
Visual Cue

The performance of rats over 12 brightness discrimination reversals was studied under two experimental conditions. Under one condition all visual cues external to the apparatus were eliminated so that only the relative positions of the discriminanda could serve as a visual cue to spatial position. Under the other condition all visual cues to position were eliminated. Under the former condition performance deteriorated with successive reversals but under the latter condition performance improved. Implications of these results for theories of successive reversal improvement were discussed and two possible explanations were suggested.

Chinese preschoolers’ acquisition of temporal adverbs indicating past, present, and future: a corpus-based study

2019 ◽  
Vol 46 (04) ◽  
pp. 760-784
Author(s):  
Lu Yao LIANG ◽  
Dandan WU ◽  
Hui LI
Keyword(s):  
Age Groups ◽  
Age Effect ◽  
The Other ◽  
Age Group ◽  
The Past ◽  
Data Analyses ◽  
Future Events ◽  
Child Mandarin ◽  
Shed Light ◽  
Temporal Adverbs

AbstractThis study investigated the development of temporal adverbs in early childhood Mandarin. All cases of temporal adverbs indicating the past, present, and future were extracted from the Early Child Mandarin Corpus (168 children in four age groups: 2;6, 3;6, 4;6, 5;6). Data analyses indicated: (1) Mandarin-speaking children produced a repertoire of 21 types of temporal adverbs, and the children in the first age group (M = 2;6) were capable of using temporal adverbs to denote past, present, and future events; (2) within each age group, the children produced significantly more future temporal adverbs than the other two subtypes; and (3) there was a significant age effect that, with increased age, more children were able to produce all subtypes of temporal adverbs. Overall, findings of this corpus-based investigation shed light upon Chinese children's early-attained ability to express the three fundamental notions of time by resorting to the appropriate linguistic devices.

scholarly journals Efecto de la edad relativa para el desarrollo del talento en jóvenes triatletas (Relative age effect for talents’ development in young triathletes)

Retos ◽  
2019 ◽  
pp. 27-32
Author(s):  
Alberto Ferriz Valero ◽  
Sergio Sellés Pérez ◽  
Miguel García Jaén ◽  
Roberto Cejuela Anta
Keyword(s):  
High Performance ◽  
Age Groups ◽  
Age Effect ◽  
The Other ◽  
Month Of Birth ◽  
Microsoft Excel ◽  
Chi Square ◽  
Relative Age ◽  
Relative Age Effect

El mes de nacimiento tiene importantes implicaciones en el desarrollo del talento deportivo, especialmente para algunos deportes y grupos de edad. El objetivo del estudio fue analizar el efecto de la edad relativa -EER- en jóvenes triatletas. Para ello, se identificó el cuartil de nacimiento de 160 triatletas cadetes que participaron en liga de triatlón valenciana durante el periodo 2012-2016, clasificando, por un lado, aquéllos que formaron parte de los programas de tecnificación y, por otro, los que obtuvieron medalla. Se aplicaron los test estadísticos Chi-cuadrado, Kruskal-Wallis y el test de contraste de proporciones a través de SPSS®y Microsoft Excel®. Los resultados mostraron que los triatletas nacidos en el primer cuartil del año predominan en los programas de tecnificación en triatlón y obtienen más medallas que el resto, especialmente de oro.Abstract. The month of birth has important implications for the development of sports talents, especially for some sports and age groups. The aim of the study was to analyze the effect of relative age -RAE - in young triathletes. For this reason, during the period 2012-2016 the birth quartile of 160 young triathletes who participated in the Valencian Triathlon League was identified, categorizing those who took part in high performance programs on one side, and on the other those who achieved medals. Chi-square, Kruskal-Wallis, and proportion contrast tests were applied through SPSS® and Microsoft Excel®. The results showed that triathletes born in the first quartile of the year predominate in triathlon high performance programs and win more medals than the rest, especially gold ones.

Development of Use of Vision between 8 and 16 yr. of Age on Performance of Slow Continuous and Fast Discrete Motor Tasks

1983 ◽  
Vol 57 (3_suppl) ◽  
pp. 1263-1269 ◽  
Author(s):  
David A. Sugden ◽  
Angela J. Cannell ◽  
John P. Cholewa ◽  
Peter J. Walder
Keyword(s):  
Age Groups ◽  
Age Effects ◽  
The Other ◽  
Developmental Research ◽  
Motor Tasks ◽  
Task Selection ◽  
Slow Walking ◽  
Delay Times ◽  
Selection For ◽  
Two Age Groups

Two experiments, one involving walking, the other throwing, were conducted with boys 8, 12, and 16 yr. of age. The tasks involved viewing a distance to walk or throw, and then having to remember that distance before acting. The slow walking task showed no age effects; viewing and delay variables were constant across ages. The throwing task showed 16-yr.-olds to be superior to the other two age groups; different viewing and delay times had little effect on this older group. The 8- and 12-yr.-olds were affected by the viewing and delay conditions. The results are discussed with respect to task selection for developmental research.

scholarly journals Performance in complex life situations: effects of age, cognition, and walking speed in virtual versus real life environments

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Michal Kafri ◽  
Patrice L. Weiss ◽  
Gabriel Zeilig ◽  
Moshe Bondi ◽  
Ilanit Baum-Cohen ◽  
...  
Keyword(s):  
Older Adults ◽  
Heart Rate ◽  
Virtual Environment ◽  
Real World ◽  
Age Groups ◽  
Age Effects ◽  
Shopping Mall ◽  
Complex Task ◽  
The Real ◽  
Gait Parameters

Abstract Background Virtual reality (VR) enables objective and accurate measurement of behavior in ecologically valid and safe environments, while controlling the delivery of stimuli and maintaining standardized measurement protocols. Despite this potential, studies that compare virtual and real-world performance of complex daily activities are scarce. This study aimed to compare cognitive strategies and gait characteristics of young and older healthy adults as they engaged in a complex task while navigating in a real shopping mall and a high-fidelity virtual replica of the mall. Methods Seventeen older adults (mean (SD) age = 71.2 (5.6) years, 64% males) and 17 young adults (26.7 (3.7) years, 35% males) participated. In two separate sessions they performed the Multiple Errands Test (MET) in a real-world mall or the Virtual MET (VMET) in the virtual environment. The real-world environment was a small shopping area and the virtual environment was created within the CAREN™ (Computer Assisted Rehabilitation Environment) Integrated Reality System. The performance of the task was assessed using motor and physiological measures (gait parameters and heart rate), MET or VMET time and score, and navigation efficiency (cognitive performance and strategy). Between (age groups) and within (environment) differences were analyzed with ANOVA repeated measures. Results There were no significant age effects for any of the gait parameters but there were significant environment effects such that both age groups walked faster (F(1,32) = 154.96, p < 0.0001) with higher step lengths (F(1,32) = 86.36, p < 0.0001), had lower spatial and temporal gait variability (F(1,32) = 95.71–36.06, p < 0.0001) and lower heart rate (F(1,32) = 13.40, p < 0.01) in the real-world. There were significant age effects for MET/VMET scores (F(1,32) = 19.77, p < 0.0001) and total time (F(1,32) = 11.74, p < 0.05) indicating better performance of the younger group, and a significant environment effect for navigation efficiency (F(1,32) = 7.6, p < 0.01) that was more efficient in the virtual environment. Conclusions This comprehensive, ecological approach in the measurement of performance during tasks reminiscent of complex life situations showed the strengths of using virtual environments in assessing cognitive aspects and limitations of assessing motor aspects of performance. Difficulties by older adults were apparent mainly in the cognitive aspects indicating a need to evaluate them during complex task performance.

scholarly journals Typical emotional expression in children’s drawings of the human face

2021 ◽  
Author(s):  
Eleonora Cannoni ◽  
Giuliana Pinto ◽  
Anna Silvia Bombi
Keyword(s):  
Emotional Expression ◽  
Visual Cues ◽  
Age Groups ◽  
Emotional Expressions ◽  
Basic Emotions ◽  
Preferential Expression ◽  
Human Figure ◽  
Figure Drawings ◽  
Number Of Faces ◽  
Human Faces

AbstractThis study was aimed at verifying if children introduce emotional expressions in their drawings of human faces, and if a preferential expression exists; we also wanted to verify if children’s pictorial choices change with increasing age. To this end we examined the human figure drawings made by 160 boys and 160 girls, equally divided in 4 age groups: 6–7; 8–9; 10–11; 12–13 years; mean ages (SD in parentheses) were: 83,30 (6,54); 106,14 (7,16) 130,49 (8,26); 155,40 (6,66). Drawings were collected with the Draw-a-Man test instructions, i.e. without mentioning an emotional characterization. In the light of data from previous studies of emotion drawing on request, and the literature about preferred emotional expressions, we expected that an emotion would be portrayed even by the younger participants, and that the preferred emotion would be happiness. We also expected that with the improving ability to keep into account both mouth and eyes appearance, other expressions would be found besides the smiling face. Data were submitted to non-parametric tests to compare the frequencies of expressions (absolute and by age) and the frequencies of visual cues (absolute and by age and expressions). The results confirmed that only a small number of faces were expressionless, and that the most frequent emotion was happiness. However, with increasing age this representation gave way to a variety of basic emotions (sadness, fear, anger, surprise), whose representation may depend from the ability to modify the shapes of both eyes and mouth and changing communicative aims of the child.

Intercalation Processes in Cobalt Substituted Nickel Oxyhydroxides

1990 ◽  
Vol 210 ◽  
Author(s):  
Claude Delmas
Keyword(s):  
Ir Spectroscopy ◽  
Mechanical Treatment ◽  
Positive Charge ◽  
Van Der Waals ◽  
The Other ◽  
Hydrolysis Reaction ◽  
Water Molecules ◽  
Layered Oxides ◽  
Experimental Conditions ◽  
Cobalt Ions

AbstractChimie douce reactions (hydrolysis and reduction) from layered oxides : NaNiO2, NaxCoO2 and NaNil-xCoxO2 lead to numerous oxyhydroxides and hydroxides which differ by the composition of the intersheet space.According to the experimental conditions of the hydrolysis reaction, the oxyhydroxides can be unhydrated or intercalated with one or two layers of water molecules. From the most hydrated phases, the other ones can be obtained by chemical, thermal and even mechanical treatment.The reduction of Co-substituted nickel oxyhydroxides leads to hydroxides in which nickel and cobalt ions are respectively divalent and trivalent. In order to compensate the excess of positive charge in the (Ni, Co)O2 sheet, anions (OH-, CO32-, SO42-, NO3-) are inserted in the Van der Waals gap.For the highest anion amounts, well ordered α*-type materials are obtained. Water molecules are simultaneously inserted in the interslab space. Their structure is strongly related to the hydrotalcite one. When the amouit of anions in the intersheet space is not sufficient, interstratified materials are obtained. In this case the (Ni,Co)(OH)2 slabs are separated by a layer of CO32- anions and water molecules (α*-type) or by an empty Van der Waals gap (β(II)-type). The amount of α*-type planes in the structure increases with the cobalt amount. All these materials have been characterized by IR spectroscopy which allows to detect the existence of two types of O-H bonds (free in α*-type plane or hydrogen bonded in ²(II)-type plane).

Belief and quantity: three-year olds' adaptation to listener's knowledge

1986 ◽  
Vol 13 (2) ◽  
pp. 305-315 ◽  
Author(s):  
Josef Perner ◽  
Susan R. Leekam
Keyword(s):  
Age Groups ◽  
The Other ◽  
Insufficient Information ◽  
The Subject

ABSTRACTTwo groups of 3-year-old children (3:0–3;6 and 3;6–4;0) observed two actions of a toy. In one condition an older partner was absent while the subject watched both of the toy actions (fully ignorant partner), whereas in the other condition the partner witnessed one of the two actions together with the subject (partially ignorant partner). When asked about the toy's actions by their partially ignorant partner both age groups adjusted their answers to their partner's ignorance and mentioned only that action which was new to their partner. However, in their answers to their fully ignorant partner the younger children tended to provide insufficient information by mentioning only one instead of both actions.

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