The Science Behind Being Left-Handed or Right-Handed

The video explores the concept of handedness, examining why people are right or left-handed and the challenges faced by left-handers in a right-handed world. It delves into brain function, explaining how the hemispheres control motor functions and the lack of genetic explanation for handedness. Experiments with children reveal when handedness is determined. The video debunks myths about left-handed clumsiness and discusses the adaptation of left-handers to right-handed tools, including scissors, and the rarity of true ambidexterity.

What is one of the main challenges faced by left-handed individuals in a predominantly right-handed world?

• They find it easier to use right-handed tools.

• They have better handwriting.

• They often struggle with using everyday tools designed for right-handed people.

• They have a natural advantage in sports.

How does the brain control the body's motor functions in relation to handedness?

• The left hemisphere controls the left side of the body.

• The right hemisphere controls the right side of the body.

• Each hemisphere controls the opposite side of the body.

• Both hemispheres control both sides equally.

At what age do children typically establish a preference for being right or left-handed?

• Between one and two years old

• Between eight and ten years old

• Between three and four years old

• Between five and seven years old

What is the term used to describe someone who can use both hands equally well?

• Ambidextrous

• Right-handed

• Left-handed

• Bilateral

Why is it often easier for left-handed individuals to use their right hand with right-handed tools?

• Right-handed tools are designed for both hands.

• Right-handed tools are more suitable for precise tasks.

• Left-handed tools are not available.

• Left-handed individuals are naturally ambidextrous.

What is a common misconception about left-handed people?

• They have better artistic skills.

• They are more athletic.

• They are clumsier than right-handed people.

• They are more intelligent.

What percentage of the population is left-handed?

• 5%

• 15%

• 10%

• 20%