Answer:
caffeine.
Explanation:
When Xi consumed several cups of coffee to stay wake for another hour.Coffee contains caffeine.Since caffeine is psychoactive drug and it is legal also unlike other psychoactive drugs.You feel more energetic.It acts as a central nervous system stimulant and when it reaches the brain it causes alertness and you will feel more awake.But Xi consumed more than he needed hence he was not able to go to sleep.
Yes, it might be.
In real life, the ratio of male birth and female birth would not be exactly even since there are factors that could be put in consideration (such as abortion and hereditary diseases)
If it conducted in a simple random sample, the ratio of male and female birth will pretty much even with 99% level of confidence.
Answer:
- It is learned through repeated exposure to inescapable or unavoidable aversive events.
- It is a concept that can only be applied to human behavior.
Explanation:
The third option is wrong because learned helplessness initially studied by Seligman and Overmeier when they paired electric shocks with dogs, not Pavlov and Skinner.
The last option is wrong because learned helplessness through the chancing of psychological frames and intervention.