Background: A person with a serious brain injury usually suffers permanent brain damage. These brain injuries usually occur when an external mechanical force, such as a violent blow or jolt to the head or body, causes brain dysfunction. An object penetrating the skull, such as a bullet or a shattered piece of the skull, also can cause traumatic brain injury. As a result, the person may have trouble talking or controlling body movements. Symptoms depend on what part of the brain was injured. Serious brain injuries can also cause personality changes and problems with mental abilities such as memory. Medicines, counseling, and other treatments may help people with serious brain injuries recover from, or at least learn to cope with, their disabilities.

Situation: Two friends were involved in a car crash. they both survived, but Mike had a serious brain injury. Vince was OK, he didn't experience any significant injuries.

Question: Which friend suffered permanent brain damage?
Answer: Mike

Situation: Two friends were involved in a car crash. they both survived, but Mike had a serious brain injury. Vince was OK, he didn't experience any significant injuries.

Question: Which friend didn't suffer permanent brain damage?
Answer: Vince

Situation: Two friends were involved in a car crash. they both survived, but Mike had a serious brain injury. Vince was OK, he didn't experience any significant injuries.

Question: Which friend didn't suffer a brain dysfunction?
Answer: Vince

Situation: Two friends were involved in a car crash. they both survived, but Mike had a serious brain injury. Vince was OK, he didn't experience any significant injuries.

Question: Which friend suffered a brain dysfunction?
Answer: Mike

Situation: Two friends were involved in a car crash. they both survived, but Mike had a serious brain injury. Vince was OK, he didn't experience any significant injuries.

Question: Which friend suffered a traumatic brain injury?
Answer: Mike

Situation: Two friends were involved in a car crash. they both survived, but Mike had a serious brain injury. Vince was OK, he didn't experience any significant injuries.

Question: Which friend didn't suffer a traumatic brain injury?
Answer: Vince

Situation: Two friends were involved in a car crash. they both survived, but Mike had a serious brain injury. Vince was OK, he didn't experience any significant injuries.

Question: Which friend didn't experience problems with mental abilities?
Answer: Vince

Situation: Two friends were involved in a car crash. they both survived, but Mike had a serious brain injury. Vince was OK, he didn't experience any significant injuries.

Question: Which friend experienced problems with mental abilities?
Answer: Mike

Situation: Two friends were involved in a car crash. they both survived, but Mike had a serious brain injury. Vince was OK, he didn't experience any significant injuries.

Question: Which friend had trouble talking?
Answer: Mike

Situation: Two friends were involved in a car crash. they both survived, but Mike had a serious brain injury. Vince was OK, he didn't experience any significant injuries.

Question: Which friend didn't have trouble talking?
Answer: Vince

Situation: Tammy and Rob rode a tandem bike down the hill. They hit a large rock and fell. Tammy wound up in the hospital and was diagnosed with a serious brain injury. Rob suffered only a mild concussion.

Question: Which person was more exposed to external mechanical force?
Answer: Tammy

Situation: Tammy and Rob rode a tandem bike down the hill. They hit a large rock and fell. Tammy wound up in the hospital and was diagnosed with a serious brain injury. Rob suffered only a mild concussion.

Question: Which person was less exposed to external mechanical force?
Answer: Rob

Situation: Tammy and Rob rode a tandem bike down the hill. They hit a large rock and fell. Tammy wound up in the hospital and was diagnosed with a serious brain injury. Rob suffered only a mild concussion.

Question: Which person had a greater chance of suffering permanent brain damage?
Answer: Tammy

Situation: Tammy and Rob rode a tandem bike down the hill. They hit a large rock and fell. Tammy wound up in the hospital and was diagnosed with a serious brain injury. Rob suffered only a mild concussion.

Question: Which person had a smaller chance of suffering permanent brain damage?
Answer: Rob

Situation: Tammy and Rob rode a tandem bike down the hill. They hit a large rock and fell. Tammy wound up in the hospital and was diagnosed with a serious brain injury. Rob suffered only a mild concussion.

Question: Which person had more trouble talking?
Answer: Tammy

Situation: Tammy and Rob rode a tandem bike down the hill. They hit a large rock and fell. Tammy wound up in the hospital and was diagnosed with a serious brain injury. Rob suffered only a mild concussion.

Question: Which person had less trouble talking?
Answer: Rob

Situation: Tammy and Rob rode a tandem bike down the hill. They hit a large rock and fell. Tammy wound up in the hospital and was diagnosed with a serious brain injury. Rob suffered only a mild concussion.

Question: Which person had less trouble controlling body movements?
Answer: Rob

Situation: Tammy and Rob rode a tandem bike down the hill. They hit a large rock and fell. Tammy wound up in the hospital and was diagnosed with a serious brain injury. Rob suffered only a mild concussion.

Question: Which person had more trouble controlling body movements?
Answer: Tammy

Situation: Tammy and Rob rode a tandem bike down the hill. They hit a large rock and fell. Tammy wound up in the hospital and was diagnosed with a serious brain injury. Rob suffered only a mild concussion.

Question: Which person had more problems with mental abilities?
Answer: Tammy

Situation: Tammy and Rob rode a tandem bike down the hill. They hit a large rock and fell. Tammy wound up in the hospital and was diagnosed with a serious brain injury. Rob suffered only a mild concussion.

Question: Which person had fewer problems with mental abilities?
Answer: Rob