Hot answers tagged

11

Observational points: It would be straightforward to point to a person who has mastered more than one keyboard layout (e.g., some of the people here). So, yes, it is possible. From my own personal experience, I can point to my use of both Vim keyboard shortcuts for editing and regular OSX/Windows keyboard shortcuts. This is certainly possible. But I'd ...


10

Yes, there are benefits, but I don't think it requires long-term switches. Studies have used this as a manipulation to try and increase self control and have found that it decrease aggression. Based on this, once one has mastered using the non-dominant hand, it seems like the benefit of continuing to use that hand might be over (as it no longer requires ...


9

There could be a correlation between negative emotions, such as anger and hostility, and muscle strength (Tolea et al., 2012). This, however, is a post-hoc examination around the relationship between personality traits and muscle strength and may not infer that 'body strength' actually increases during anger and hostility. "In spite of the evidence for ...


6

Generally, EEG potentials are primarily averaged over trials, not electrodes. Averaging over electrodes is often done in addition to trial averaging, but this by itself does not make the potentials visible on a single-trial basis since the "noise" overshadowing the potentials is largely shared by all adjacent electrodes. The Bereitschaftspotential is also ...


6

I have never heard of this formula, but from a cognitive psychology point of view you might look the theory of expert performance (Ericsson et al., 1993). In this theory it is argued that an important factor in the aquisition of expert performance is what the authors call deliberate practice. What is meant by this is an activity, wherein someone actively ...


6

Although I find the concept of flow quite interesting, I'm not so sure about needing to invoke the flow state to explain motor enhancement from unrelated continuous movements. For example, one possible explanation for why continuous motion would improve learned movements like typing is that the motor cortex is typically used to model periodic movements as a ...


6

I would hazard a guess that some type of motor system interference is taking place when you visualize the movement versus visualizing an abstract shape. For example, Kilner et al. (2003) found that actions that are observed can interfere with incongruous executed actions. They had subjects make arm movements that were either similar or dissimilar to those ...


6

I never thought that my Bachelor Thesis would ever come in handy. Thank you for this question! Short answer No, you cannot keep up two unrelated rhythms in a stable coordinated fashion when tapping for your finger for instance. Long Answer Let us start with (and skip over) the oldest paper that I have about it. Haken, Kelso and Bunz (1985) described in a ...


5

Short answer Muscles are controlled by motor neurons in the spinal cord. The number of motor neurons that fire, as well as their individual firing rates govern the control of muscle force. Background Muscles consist of contractile elements: the muscle fibers. These muscle fibers are under direct control of the motor neurons in the spinal cord (Purves et al.,...


4

I personaly also play piano and see myself into that flow easly, Check out what I just found From: http://en.wikipedia.org/wiki/Flow_(psychology) Flow is the mental state of operation in which a person performing an activity is fully immersed in a feeling of energized focus, full involvement, and enjoyment in the process of the activity. In essence, ...


4

It has nothing to do with perception. It's simply because there are infinitely many ways to go in circles, while only one way to go straight. Even a slightest bias towards one side will produce a circle. When other cues are given to correct the bias, one is able to track straight lines. Even robots (or toy cars) that are designed to go straight lines will ...


4

I think that this question is hard to answer because there is little known about the cerebellum, and few instances of people who have been born without one. There are only 10 known cases of complete cerebellar agenesis, which can hardly be considered a sample size. Broadly speaking, the cerebellum can be seen a 'fine tuning' device in the brain. It does not ...


4

Short answer: Not really, because a) handwriting style is generally individual-dependent and not occupation-dependent, and b) the fine-motor skills responsible for handwriting legibility are specific enough to be near-independent of the muscle control that mandates one's success in athletics and/or music. Detailed answer: It is probably difficult to say ...


4

Forgive me for not including any scientific references (I've been out of the human movement science for a while), but it is believed that movements are saved and executed in a "goal-directed" way. It is not the case that every muscle has its own area and they are individually activated on a scale of 0 (no contraction) -100 (max contraction) depending on the ...


4

Descending inputs onto the central pattern generating circuit provide stimulus in the form of neuromodulatory chemicals and synaptic currents (Marder 2012). The leech heartbeat pacemaker and the stomatogastric ganglion in crustaceans are well-studied model systems that show descending input from higher functions. Specifically, in humans, we are not sure. ...


4

According to "Motor Skills Are Strengthened through Reconsolidation" (available through SciHub) adding variability to practice sessions increases learning speed. In the paper, patients were directed to move a cursor on a screen to certain targets via pinch force. Patients who's pinch force mapping was modified during each trial ended up learning faster and ...


4

Yes. In one famous experiment,a college basketball team was divided into three groups. Group 1 was supposed to show up to practice shooting baskets for a week on a daily basis. Group 2 was asked to "think about" practicing shooting baskets during the alloted time, without showing up. Group 3 was asked to "forget about" basketball for the week. After the ...


3

The answer is yes, you can only use one at a time though since there is a transition time for your brain to recognize and switch between layouts internally. I know this because I use two different keyboard layouts regularly, they're not as different as QWERTY and DVORAK, the biggest differences are on which buttons symbols are placed (e.g. where the ? and * ...


3

First, adrenalin reduces hand steadiness and increases anxiety (Basowitz, Korchin, Oken, Goldstein, & Gussack, 1956), so other causes of anxiety seem likely to reduce steadiness by promoting the release of adrenalin. Next, here's an odd reference for a more voluntary psychopharmacological cause of hand-arm unsteadiness: drug abuse (including alcohol; ...


3

There was an interesting study that compared practice by imagining a movement to practice by executing ot and found an increase in strength of ~35% for imagining it, compared to ~55% for actually doing it; additionally, they found an increase in cortical potentials corresponding to the increase in strength. They concluded that mental imagery alone ...


3

Q: Does distraction cause us to skip to the next step in a motor plan? A: It depends on the processes in progress, characteristics of the subject and characteristics of the signal to produce interference (based on an orientation reflex that is the beginning of an act of involuntary attention), many factors, mainly: Characteristics of the process involved ...


3

Stuttering is a neuromuscular disorder. It consists of problems in sequencing and timing the movements required for the speech. The whisper is speech without vibration of the vocal cords. Since there is no vocal fold vibration, the muscles that control pitch are not active and the larynx does not need to move. This means when the PWS ( person who stutters) ...


3

Research suggests that endurance is improved when movements are synchronized with a musical beat. [1] This research also supports the idea that music has 'motivational' qualities that may enhance performance. One study measured the pace and attitudes of participants running on a treadmill. The control conditions included: 1) no music ('acoustic stimuli'), 2) ...


3

Watching others perform a skill serves as both instruction and visualization practice. The instruction can provide the beginner with a wealth of information that they lack, when starting a skill. It provides the experienced practitioner with details of technique that informs their growth. How productive watching can be sometimes depends upon previous ...


3

I don't know whether the following has been used to distinguish natural from "corrected" right handers, but following up on the suggestion from @user3169, the Edinburgh Handedness Inventory contains a range of handedness tasks, many of which would probably not be as explicitly trained as writing or eating, and which thus potentially could be used in ...


3

My general understanding is that thinking about executing the motor tasks in your mind can improve skill. It's not as good as actually practicing the task. I'm not sure exactly how conclusive the literature is on what moderates the effectiveness of mental practice. However, presumably, the nature of the task, the nature of the mental activities performed, ...


Only top voted, non community-wiki answers of a minimum length are eligible