Trajectory formation and speed-accuracy trade-off in aiming movements

1998 ◽  
Vol 321 (5) ◽  
pp. 377-383 ◽  
Author(s):  
Reinoud J. Bootsma ◽  
Denis Mottet ◽  
Frank T.J.M. Zaal
Keyword(s):  
Trade Off ◽  
Aiming Movements ◽  
Trajectory Formation ◽  
Speed Accuracy

Modeling movement variability in space and time

1997 ◽  
Vol 20 (2) ◽  
pp. 322-322
Author(s):  
Dagmar Sternad ◽  
Karl M. Newell
Keyword(s):  
Kinematic Model ◽  
Space Time ◽  
Time Constraints ◽  
Movement Variability ◽  
Trade Off ◽  
Movement Accuracy ◽  
Function Fitting ◽  
Trajectory Formation ◽  
Pragmatic Function ◽  
Speed Accuracy

Plamondon & Alimi propose a universal account of trajectory formation and speed/accuracy trade-off in rapid movements but fail, because: (1) the kinematic model ignores the more fundamental dynamics of movement generation, and (2) it does not capture the essential space-time constraints of movement accuracy. Hence, the modeling lacks a biologically and behaviorally principled foundation and is driven by pragmatic function fitting.

Dual Goals for Speed and Accuracy on the Same Performance Task

2012 ◽  
Vol 11 (3) ◽  
pp. 118-126 ◽  
Author(s):  
Olive Emil Wetter ◽  
Jürgen Wegge ◽  
Klaus Jonas ◽  
Klaus-Helmut Schmidt
Keyword(s):  
Memory Scanning ◽  
Performance Task ◽  
Performance Tasks ◽  
Trade Off ◽  
Test Experiment ◽  
Trade Offs ◽  
New Finding ◽  
Sternberg Paradigm ◽  
Speed Accuracy ◽  
Speed And Accuracy

In most work contexts, several performance goals coexist, and conflicts between them and trade-offs can occur. Our paper is the first to contrast a dual goal for speed and accuracy with a single goal for speed on the same task. The Sternberg paradigm (Experiment 1, n = 57) and the d2 test (Experiment 2, n = 19) were used as performance tasks. Speed measures and errors revealed in both experiments that dual as well as single goals increase performance by enhancing memory scanning. However, the single speed goal triggered a speed-accuracy trade-off, favoring speed over accuracy, whereas this was not the case with the dual goal. In difficult trials, dual goals slowed down scanning processes again so that errors could be prevented. This new finding is particularly relevant for security domains, where both aspects have to be managed simultaneously.

Path Curvature in Workspace and in Joint Space: Evidence for Coexisting Coordinative Rules in Aiming

Motor Control ◽  
1998 ◽  
Vol 2 (4) ◽  
pp. 331-351 ◽  
Author(s):  
Edwin Van Thiel ◽  
Ruud G.J. Meulenbroek ◽  
Wouter Hulstijn
Keyword(s):  
Joint Space ◽  
Line Production ◽  
Vertical Movements ◽  
Space Planning ◽  
Aiming Movements ◽  
Trajectory Formation ◽  
Straight Line ◽  
Bottom Left ◽  
Path Curvature ◽  
Point To Point

In this study we tried to establish whether point-to-point aiming movements are planned in workspace, joint space, or both. Eight right-handed subjects performed horizontal, vertical, and diagonal aiming movements on a transversal plane. Movements were performed at several speeds. Curvature variations of the hand and corresponding joint-space paths were investigated as a function of position, direction, and speed. Straightness of hand paths predominated for vertical movements but was systematically violated for horizontal and top-right to bottom-left movements. Furthermore, the hand-path curvature of the latter movements increased with speed. Joint-space paths showed more deviation from a straight line than hand paths except for top-left to bottom-right movements in which the paths were equally curved. A comparison of normalized path curvatures at the hand and joint level indicated that in aiming, the coordinative rule of straight-line production seems to apply to both workspace and joint-space planning. The present findings confirm Kawato's (1996) views that optimization processes operate concurrently at the two control levels of arm-trajectory formation under study.

scholarly journals Constructal model of fitts’s law to predict speed–accuracy trade-off

2017 ◽  
Vol 12 (1) ◽  
pp. 44-54
Author(s):  
Satish Boregowda ◽  
Rod Handy ◽  
Darrah Sleeth ◽  
Andrew Merryweather
Keyword(s):  
Trade Off ◽  
Speed Accuracy
Sign in / Sign up

Export Citation Format

Share Document