Relationship between Speed and Accuracy in an over-Arm Throw

1984 ◽  
Vol 59 (1) ◽  
pp. 219-222 ◽  
Author(s):  
Catherine Indermill ◽  
William S. Husak
Keyword(s):  
Analysis Of Variance ◽  
Repeated Measures ◽  
Maximum Velocity ◽  
The Other ◽  
Spatial Accuracy ◽  
Fitts Law ◽  
Speed And Accuracy ◽  
Muscular Coordination

Principles of force and variability of force suggest that generating maximal forces will result in greater spatial accuracy. 18 right-handed males performed an over-arm throwing task at 50, 75, and 100% of maximum velocity while attempting to hit an archery target. A one-way analysis of variance of velocity with repeated measures on the target showed that the 75% condition was significantly more accurate than either of the other two. The principles may not be generalizable to tasks involving muscular coordination; it seems Fitts' Law may be more applicable.

Fluctuation in Psychological State during Two Encounter-Group Weekends

1971 ◽  
Vol 29 (1) ◽  
pp. 267-274 ◽  
Author(s):  
T. J. Long ◽  
J. M. Schuerger ◽  
D. A. Bosshart ◽  
R. J. Menges
Keyword(s):  
Analysis Of Variance ◽  
Repeated Measures ◽  
Psychological Factors ◽  
Statistical Technique ◽  
The Other ◽  
Psychological State ◽  
Psychological States ◽  
Encounter Group ◽  
Group Experiences ◽  
Anxiety Levels

Two independent studies are combined and reported here. The Cattell-Curran Psychological State Battery (seven factors) was administered on three occasions to two separate samples. One met for an encounter-group weekend in March and the other in August, 1969. On both occasions the same questions were being asked (1) do anxiety levels fluctuate in a predicted manner during encounter group experiences and (2) is it possible to detect systematic fluctuations in several, measured psychological states during these experiences? Both questions required a statement of the probability of data over occasions, so the appropriate statistical technique was judged to be analysis of variance for repeated measures. The data did not support the hypothesis that anxiery, as measured, fluctuates systematically during weekend encounter-group experiences. But, there were significant fluctuations in some of the other psychological factors.

Length of Hair Affects P1 and N170 Latencies for Perception of Women's Faces

2018 ◽  
Vol 125 (6) ◽  
pp. 1011-1028 ◽  
Author(s):  
Hideaki Tanaka
Keyword(s):  
Analysis Of Variance ◽  
Repeated Measures ◽  
The Other ◽  
Perceptual Processing ◽  
Fixed Size ◽  
Short Hair ◽  
Variable Size ◽  
Medium Length ◽  
Repeated Measures Analysis ◽  
Related Potentials

This study investigated the relationship between length of hair in facial stimuli and latency and amplitude of the P1 and N170 components of event-related potentials during facial perception. Electroencephalography was recorded from 21 Japanese participants (four men, 17 women) who were shown pictures of faces with one of three lengths of hair: long, medium length, or short. In addition, we used both fixed-size and variable-size blocks. In fixed-size blocks, the three types of stimuli were matched to have the same overall size; in variable-size blocks, long hair stimuli were the biggest, medium length hair stimuli were medium sized, and short hair stimuli were the smallest. We analyzed P1 latency and amplitude using two-way (6 × 2) repeated-measures analysis of variance over length of hair and electrode; N170 latency and amplitude were analyzed using three-way (6 × 2 × 2) repeated-measures analysis of variance over length of hair, hemisphere, and electrode. The latency of P1 to faces with short hair in variable-size blocks was significantly longer than that to the other five stimulus types ( p < .01 for four of the other types; p = .083 for medium length hair in variable-size blocks). The latency of N170 to faces with long hair in variable-size blocks was significantly shorter than that to faces with medium length hair and short hair in variable-size blocks ( p = .026 and p = .086, respectively). These results indicate that length of hair influenced P1 and N170 latency, supporting the notion that length of hair is a significant external facial feature. Because long hair attracted participants' attention, there was early perceptual processing of this feature. In contrast, because short hair did not attract attention, perceptual processing of this feature was late.

The shape of creaminess: consumers expected and perceived rounded chocolates as creamier than squared

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Iuri Yudi Furukita Baptista ◽  
Fabiana Carvalho ◽  
Priscilla Efraim ◽  
Paulo Túlio de Souza Silveira ◽  
Jorge Behrens
Keyword(s):  
Multivariate Analysis ◽  
Correlation Analysis ◽  
Analysis Of Variance ◽  
Repeated Measures ◽  
Design Methodology ◽  
Sensory Perception ◽  
The Other ◽  
Multivariate Analysis Of Variance ◽  
Content Type ◽  
Sensory Interactions

PurposeResearch on cross-modal sensory interactions has shown that visual aspects of food can influence consumer's expectation and perception of taste, mouthfeel and liking. This paper aims to investigate the effects of a rounded (“bouba”) and a squared (“kiki”) shape on expected and perceived sweetness, bitterness, creaminess and liking of chocolates.Design/methodology/approachBrazilian consumers (N = 230) divided into two groups of 115 individuals each evaluated five chocolates containing 30, 40, 50, 60 and 70% of cocoa. One of the groups evaluated all formulations in the rounded shape and the other in the squared shape. Results were analysed with mixed multivariate analysis of variance (mixed-MANOVA) between shapes, repeated-measures MANOVA between pre- and post-tasting and Pearson's correlation analysis was performed between liking ratings and sweetness, bitterness and creaminess confirmation/disconfirmation.FindingsThe study found significant effects (p < 0.05) of shape on expected and perceived creaminess but not on other attributes; of cocoa percentage (30, 40, 50, 60 and 70%) on all four attributes; and time (pre- and post-tasting) on sweetness, bitterness and liking but not creaminess. Finally, it found significant negative correlations between the creaminess difference indices and the liking ratings for the 30, 50 and 60% chocolates.Originality/valueThis study reports that consumers may expect and perceive chocolates as creamier in a rounded shape than in an angular shape and that if the expectation of creaminess is not confirmed by sensory perception, acceptability may be negatively affected.

Psychophysically Based Physical Capability Limits For Right Angle Power Tool Operation

2020 ◽  
Vol 64 (1) ◽  
pp. 910-914
Author(s):  
Jonathan Valencia ◽  
Joel Cort
Keyword(s):  
Analysis Of Variance ◽  
The Other ◽  
Mixed Design ◽  
Joint Orientation ◽  
Physical Capability ◽  
Subject Variables ◽  
Group A ◽  
Repeated Analysis ◽  
Post Hoc

A psychophysical methodology was utilized to examine 40 non-skilled female participants performing right-angle power tool (RAPT) fastening tasks. A combination of two between subject variables were examined for a total of four between-subject groups: joint orientation (horizontal and vertical planes) and joint hardness (hard and soft joints). Participants were evenly distributed into one of four joint orientation- hardness groups. Within each group, a combination of three fastening strategies and three fastening frequencies were performed by each participant. The chosen target torque determined the physical capability limits (PCL). A mixed-design repeated analysis of variance with Tukey’ significance post hoc test were used to determine any significance with the measured variables ( p<0.05). Fastening strategy and frequency influenced the chosen torque magnitude. Participants chose significantly higher target torques with the Turbo Tight strategy in comparison to the other two strategies. Furthermore, participants chose to accept lower target torques and forces as fastening frequency increased.

Comparison of plasma progesterone profiles in cyclic, pregnant, pseudopregnant and hysterectomized pigs between 8 and 27 days after oestrus

1988 ◽  
Vol 119 (1) ◽  
pp. 111-116 ◽  
Author(s):  
G. J. King ◽  
R. Rajamahendran
Keyword(s):  
Least Squares ◽  
Analysis Of Variance ◽  
The Other ◽  
Corpora Lutea ◽  
Plasma Progesterone ◽  
The Third ◽  
Secretory Potential ◽  
The Mean

ABSTRACT Plasma progesterone concentrations were compared in cyclic (n = 12), pregnant (n =12), oestradiol-induced pseudopregnant (n=12) and hysterectomized gilts (n=10) between days 8 and 27 after oestrus. The results were grouped into periods covering days 8–13, 14–20 and 21–27 and analysed by least-squares analysis of variance. Plasma progesterone concentrations were significantly (P<0·001) higher in hysterectomized compared with other groups between days 8 and 13. Progesterone concentrations declined rapidly after day 14 in cyclic females and gradually in the other groups. Throughout the third and fourth weeks the mean progesterone concentrations for hysterectomized animals were consistently higher than for pseudopregnant animals (P<0·05). The pregnant group means were below but not significantly different from the hysterectomized means in both of the last two periods. The greater progesterone concentrations in hysterectomized gilts indicated that secretion is high without any conceptus-produced or -mediated luteotrophin, and corpora lutea in cyclic, pregnant or pseudopregnant gilts may never reach full secretory potential. J. Endocr. (1988) 119, 111–116

scholarly journals ICT evaluation models and performance of medium and small enterprises

2014 ◽  
Vol 20 (1-2) ◽  
pp. 9-24
Author(s):  
Anass Bayaga ◽  
Emmanuel O. Adu
Keyword(s):  
Risk Management ◽  
Analysis Of Variance ◽  
Repeated Measures ◽  
Operational Risk ◽  
Small Enterprises ◽  
Operational Risk Management ◽  
Evaluation Models ◽  
Ict Adoption ◽  
And Performance ◽  
Medium And Small Enterprises

Abstract Building on prior research related to (1) impact of information communication technology (ICT) and (2) operational risk management (ORM) in the context of medium and small enterprises (MSEs), the focus of this study was to investigate the relationship between (1) ICT operational risk management (ORM) and (2) performances of MSEs. To achieve the focus, the research investigated evaluating models for understanding the value of ICT ORM in MSEs. Multiple regression, Repeated-Measures Analysis of Variance (RM-ANOVA) and Repeated-Measures Multivariate Analysis of Variance (RM-MANOVA) were performed. The findings of the distribution revealed that only one variable made a significant percentage contribution to the level of ICT operation in MSEs, the Payback method (β = 0.410, p < .000). It may thus be inferred that the Payback method is the prominent variable, explaining the variation in level of evaluation models affecting ICT adoption within MSEs. Conclusively, in answering the two questions (1) degree of variability explained and (2) predictors, the results revealed that the variable contributed approximately 88.4% of the variations in evaluation models affecting ICT adoption within MSEs. The analysis of variance also revealed that the regression coefficients were real and did not occur by chance

Effect of Dramatization on Speaking Skills ond Academic Achievement In English Among Primary Students

2021 ◽  
pp. 163-182
Author(s):  
Amit Kauts ◽  
Monika
Keyword(s):  
Academic Achievement ◽  
Analysis Of Variance ◽  
Traditional Method ◽  
The Other ◽  
Primary Students ◽  
Control Group ◽  
Gain Scores ◽  
Achievement Gain ◽  
Experimental Group ◽  
Speaking Skills

The present study intends to examine the effect of dramatization on speaking skills and academic achievement in English among primary students. The sample consisted of 240 fifth class students from four co-educational private schools of district Fazilka. The sample was divided into two groups randomly. One of the two groups was designated as Experimental Group and the other as Control Group. Experimental group was taught through Dramatization and the control group was taught through traditional method. The obtained data was analysed using two way Analysis of Variance. The results revealed that (i) Teaching through dramatization was found effective than traditional method with respect to achievement of students in English and gain scores in speaking skills (ii) Boys outperformed girls in case of achievement gain scores (iii) Girls outperformed boys in case of gain scores of speaking skills.

Utility of Analysis of Variance with Repeated Measures Programs for Estimating Reliability

1975 ◽  
Vol 41 (2) ◽  
pp. 441-442 ◽  
Author(s):  
Ronald A. Berk
Keyword(s):  
Measurement Error ◽  
Computer Program ◽  
Analysis Of Variance ◽  
Repeated Measures ◽  
Theory Of Measurement ◽  
Generalizability Theory ◽  
Intraclass Correlation ◽  
Program Output

This paper presents a brief description of the generalizability theory of measurement error and its relation to analysis of variance with repeated measures. The intraclass correlation is defined in terms of analysis of variance computer program output. The usefulness of several programs is discussed.

Using Mystat to Analyze a Repeated-Measures Design

1991 ◽  
Vol 73 (3) ◽  
pp. 757-758 ◽  
Author(s):  
John F. Walsh
Keyword(s):  
Analysis Of Variance ◽  
Repeated Measures ◽  
Laboratory Experiments ◽  
Repeated Measures Design ◽  
Variance Design

Laboratory experiments having a two-way analysis of variance design with repeated-measures on one factor are analyzed by MYSTAT. The key is in coding subjects as a factor and expressing the design as a three-way factorial with one subject per cell.

Effects of a Combination of Stances and Points of Aim on Putting Accuracy

1988 ◽  
Vol 66 (1) ◽  
pp. 139-143 ◽  
Author(s):  
Erich Gott ◽  
Carl Mc Gown
Keyword(s):  
Analysis Of Variance ◽  
Repeated Measures ◽  
Traditional Method ◽  
Constant Error ◽  
Popular Opinion ◽  
Variable Error ◽  
Repeated Measures Analysis ◽  
Better Than

The purpose of this study was to determine the effects of two putting stances (conventional versus side-saddle) and two points of aim (ball versus hole) on putting accuracy. Subjects (12 men, 4 women) were taught to putt using four methods: (a) conventional stance, eyes on the ball; (b) conventional stance, eyes on the hole; (c) side-saddle stance, eyes on the ball; and (d) side-saddle stance, eyes on the hole. Each subject practiced each method for 2 wk., after which they were tested for purring accuracy by counting putts made, determining constant error, and by calculating variable error. Accuracy was assessed at 5 and 15 ft. A 2 by 2 repeated-measures analysis of variance showed that there was no single combination of stance and point of aim that was significantly better than another at either distance. This suggests that, contrary to popular opinion, the traditional method of putting is not the best method for putting; other methods are equally as good and could be used if individually desired.

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