scholarly journals Target uncertainty does not lead to more distraction by singletons: Intertrial priming does

2005 ◽  
Vol 67 (8) ◽  
pp. 1354-1361 ◽  
Author(s):  
Yaïr Pinto ◽  
Christiann L. Olivers ◽  
Jan Theeuwes
Keyword(s):  
Target Uncertainty ◽  
Intertrial Priming

Intertrial priming: Decision, not selection

2006 ◽  
Author(s):  
Christian N. L. Olivers ◽  
Martijn Meeter
Keyword(s):  
Intertrial Priming

scholarly journals Techniques for analyses of trends in GRUAN data

2015 ◽  
Vol 8 (4) ◽  
pp. 1673-1684 ◽  
Author(s):  
G. E. Bodeker ◽  
S. Kremser
Keyword(s):  
Measurement Uncertainty ◽  
Trend Analysis ◽  
Global Climate ◽  
Regional Climate ◽  
Added Value ◽  
Least Squares Regression ◽  
Target Uncertainty ◽  
Reference Quality ◽  
Measurement Uncertainties

Abstract. The Global Climate Observing System (GCOS) Reference Upper Air Network (GRUAN) provides reference quality RS92 radiosonde measurements of temperature, pressure and humidity. A key attribute of reference quality measurements, and hence GRUAN data, is that each datum has a well characterized and traceable estimate of the measurement uncertainty. The long-term homogeneity of the measurement records, and their well characterized uncertainties, make these data suitable for reliably detecting changes in global and regional climate on decadal time scales. Considerable effort is invested in GRUAN operations to (i) describe and analyse all sources of measurement uncertainty to the extent possible, (ii) quantify and synthesize the contribution of each source of uncertainty to the total measurement uncertainty, and (iii) verify that the evaluated net uncertainty is within the required target uncertainty. However, if the climate science community is not sufficiently well informed on how to capitalize on this added value, the significant investment in estimating meaningful measurement uncertainties is largely wasted. This paper presents and discusses the techniques that will need to be employed to reliably quantify long-term trends in GRUAN data records. A pedagogical approach is taken whereby numerical recipes for key parts of the trend analysis process are explored. The paper discusses the construction of linear least squares regression models for trend analysis, boot-strapping approaches to determine uncertainties in trends, dealing with the combined effects of autocorrelation in the data and measurement uncertainties in calculating the uncertainty on trends, best practice for determining seasonality in trends, how to deal with co-linear basis functions, and interpreting derived trends. Synthetic data sets are used to demonstrate these concepts which are then applied to a first analysis of temperature trends in RS92 radiosonde upper air soundings at the GRUAN site at Lindenberg, Germany (52.21° N, 14.12° E).

scholarly journals Beta-band desynchronization reflects uncertainty in effector selection during motor planning

2021 ◽  
Author(s):  
Milou J.L. van Helvert ◽  
Leonie Oostwoud Wijdenes ◽  
Linda Geerligs ◽  
W. Pieter Medendorp
Keyword(s):  
Time Window ◽  
Brain Activity ◽  
Motor Planning ◽  
Reaction Times ◽  
Motor Preparation ◽  
Motion Artifact ◽  
Theta Band ◽  
Beta Band ◽  
Target Uncertainty ◽  
Band Power

AbstractWhile beta-band activity during motor planning is known to be modulated by uncertainty about where to act, less is known about its modulations to uncertainty about how to act. To investigate this issue, we recorded oscillatory brain activity with EEG while human participants (n = 17) performed a hand choice reaching task. The reaching hand was either predetermined or of participants’ choice, and the target was close to one of the two hands or at about equal distance from both. To measure neural activity in a motion-artifact-free time window, the location of the upcoming target was cued 1000-1500 ms before the presentation of the target, whereby the cue was valid in 50% of trials. As evidence for motor planning during the cueing phase, behavioral observations showed that the cue affected later hand choice. Furthermore, reaction times were longer in the choice than in the predetermined trials, supporting the notion of a competitive process for hand selection. Modulations of beta-band power over central cortical regions, but not alpha-band or theta-band power, were in line with these observations. During the cueing period, reaches in predetermined trials were preceded by larger decreases in beta-band power than reaches in choice trials. Cue direction did not affect reaction times or beta-band power, which may be due to the cue being invalid in 50% of trials, retaining effector uncertainty during motor planning. Our findings suggest that effector uncertainty, similar to target uncertainty, selectively modulates beta-band power during motor planning.New & NoteworthyWhile reach-related beta-band power in central cortical areas is known to modulate with the number of potential targets, here we show, using a cueing paradigm, that the power in this frequency band, but not in the alpha or theta-band, is also modulated by the uncertainty of which hand to use. This finding supports the notion that multiple possible effector-specific actions can be specified in parallel up to the level of motor preparation.

scholarly journals Dealing with Target Uncertainty in a Reaching Control Interface

PLoS ONE ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. e86811 ◽  
Author(s):  
Elaine A. Corbett ◽  
Konrad P. Körding ◽  
Eric J. Perreault
Keyword(s):  
Target Uncertainty ◽  
Control Interface

Uncertainty and Perceived Control as Predictors of Communicative Participation and Mental Health in Adults Who Stutter

2022 ◽  
pp. 1-13
Author(s):  
Michael P. Boyle ◽  
Nicole J. Chagachbanian
Keyword(s):  
Mental Health ◽  
Perceived Control ◽  
Global Mental Health ◽  
Hierarchical Regression ◽  
Target Uncertainty ◽  
Significant Variance ◽  
Therapeutic Outcomes ◽  
Communicative Participation ◽  
Adults Who Stutter

Purpose: This study examined the role of uncertainty and perceived control in predicting the communicative participation and mental health of adults who stutter. Method: Two hundred sixty-nine adults who stutter completed measures of uncertainty about stuttering, perceived control of stuttering, communicative participation, and global mental health. In addition, participants self-reported on a variety of demographic and speech-related measures. Correlational analyses and hierarchical regression were performed to determine associations between variables of interest. Results: Uncertainty accounted for significant variance in communicative participation and global mental health after statistically controlling for the effects of demographic and speech-related variables. Perceived control accounted for significant variance in communicative participation over and above what was accounted for by demographic variables, speech-related variables, and uncertainty. Conclusions: The findings suggest that uncertainty about stuttering and perceived control of stuttering should be accounted for during assessment and intervention with adults who stutter. Interventions that specifically target uncertainty and perceived control may be useful in improving therapeutic outcomes for individuals who stutter.

Influence of target uncertainty on reaching movements while standing in stroke

2019 ◽  
Vol 64 ◽  
pp. 283-295
Author(s):  
Camila Astolphi Lima ◽  
Sandra Regina Alouche ◽  
Alessandra Maria Schiavinato Baldan ◽  
Paulo Barbosa de Freitas ◽  
Sandra Maria Sbeghen Ferreira Freitas
Keyword(s):  
Reaching Movements ◽  
Target Uncertainty
Sign in / Sign up

Export Citation Format

Share Document