Selective mutism in children is the inability to speak in certain situations despite being able to do so in others. It is often linked to social anxiety disorders and can be accompanied by other anxiety-related problems. However, children with selective mutism tend to score higher on measures of intelligence and emotional intelligence. The most prominent […]
Selective laser sintering is an additive manufacturing process that uses a high-temperature laser to melt powder into a predetermined shape. A computer model is required, and the laser builds the shape layer by layer. The powder used is usually a mixture of two parts, and the cooling period varies depending on the materials used. Selective […]
Selective soldering is a process used in electronic assembly to solder specific components to a printed circuit board while leaving other areas unaffected. There are several technologies for performing this task, including all-in-one and one-at-a-time methods, with varying levels of precision and speed. The most accurate method is laser welding, but it is slower than […]
The Selective Service System registers all American men aged 18-25 in case of a military draft and maintains a database of healthcare professionals. Founded in 1917, it establishes a lottery system, calls men for physical exams, and processes deferral and conscientious objector applications. Women cannot register. The SSS can mobilize regional draft commissions and conducts […]
Selective permeability is the ability of a cell membrane to control which molecules can enter or leave the cell. This can occur through passive transport, active transport, or vesicles. The size, charge, and solubility of molecules affect permeability, which is essential for sustaining life. In cell biology, selective permeability is the property of a living […]
Selective visual attention allows the brain to focus on important details while ignoring the rest, known as inattentional blindness. There are two types of visual processing: preattentive processing and focused attention. The focus range can be as small as one degree of the total visual field. Selective visual attention allows a person to acquire a […]
Selective laser melting is a rapid manufacturing process that uses a laser to melt metal particles and create 3D components. It relies on computer aided design and an inert environment, and can reduce waste and manufacturing costs. The equipment can be purchased, rented, or outsourced, and a variety of metals can be used. Selective laser […]
Selective posterior rhizotomy is a surgical procedure that cuts posterior nerve roots in the lower spinal region to relieve muscle stiffness or spasticity in patients with cerebral palsy. It is a permanent surgery that can improve patient mobility, but may cause muscle weakness. It is usually performed on children between the ages of two and […]
Selective hearing is when people ignore things they don’t want to hear, but it is not a physiological condition. It can be done consciously or unconsciously and is a manifestation of the changing nature of attention. Children are especially susceptible, and it can also occur when a person chooses to hear only what they want […]
Selective attention tests show how people can be unaware of certain visual stimuli when they focus on other aspects. Dr. Daniel Simons’ famous test involves counting basketball passes while a person in a gorilla suit walks across the scene, demonstrating inattentional blindness. These tests reveal how the brain processes attention and memory. A selective attention […]
Selective attention is the process by which people choose what to focus on and how much concentration to exert. Theories suggest that people filter out what they deem unnecessary or unimportant, and neural function is heavily involved. ADHD and autism can affect attention, while poor sleep and brain injuries can shorten attention span. Advertisers try […]
