) Researchers were interested to understand effects of lack of sleep on heart rate. Each person’s...
) Researchers were interested to understand effects of lack of sleep on heart rate. Each person’s heart rate was recorded. 10 individuals were randomly selected and deprived sleep for 24 hours while 8 individuals were allowed to sleep for 24 hours. After the study time elapsed, each person’s heart beat was measured and recorded again. The heart rate differences were recorded in a table as follows: Deprived sleep -5 8 -4 3 9 7 4 -2 4 8 Allowed to sleep -6 5 7 4 8 1 6 6establish 95% confidence interval the mean difference that effect of lack of sleep has on heart rate.
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) Researchers were interested to understand effects of lack of
sleep on heart rate. Each person’s...
Researchers Stickgold, James, and Hobson investigated delayed effects of sleep deprivation on learning in a study...
Researchers Stickgold, James, and Hobson investigated delayed effects of sleep deprivation on learning in a study published in Nature Neuroscience (2000). Twenty-one volunteers, aged 18–25 years, were first trained on a visual discrimination task that involved watching stimuli appear on a computer screen and reporting what was seen.one group was randomly assigned to be deprived of sleep for 30 hours, followed by two full nights of unrestricted sleep, whereas the other group was allowed to get unrestricted sleep on all...
Suppose that a psychologist is interested in performance on a cognitive task under sleep-deprived and rested...
Suppose that a psychologist is interested in performance on a cognitive task under sleep-deprived and rested conditions among 10 participants. Performance will be measured by the number of errors made by the participants in each condition. The researcher believes that more errors will be made under the sleep-deprived condition. Her observations are reported below. Use the 7 steps of null hypothesis testing to test her hypothesis, set alpha at .01. For this problem, MD = -3.1 and SED = 3.14...
4. Sleep Deprivation: (10 pts) Sleep researchers decide to test the impact of REM sleep deprivati...
4. Sleep Deprivation: (10 pts) Sleep researchers decide to test the impact of REM sleep deprivation on a computerized assembly line task Subjects are required to participate in two nights of testing in which subjects are allorwed a total of four hours of sleep each night However, on one of the nights, the subject is awakened immediately upon achieving REM sleep (REM deprived. On the altenate night, subjects are randomly awakened at various times throughout the hou total sleep session...
2. Researchers were interested in evaluating the effects of two low-fat diets with and without resistance...
2. Researchers were interested in evaluating the effects of two low-fat diets with and without resistance exercise training (RT) on weight loss. The diets differed in the carbohydrate-to-protein ratio. A total 80 individuals with type 2 diabetes participated in the study. There were 40 men and 40 women and each group was randomly assigned to an isocaloric diet of either standard or high protein, with or without supervised resistance training (3 days/week) for 16 weeks. Body weight was measured before...
A psychopharmacologist (a psycholgist interested in the effects of drugs and physiology) is interested in determining...
A psychopharmacologist (a psycholgist interested in the effects of drugs and physiology) is interested in determining the effects of caffeine (from coffee) on exam performance. Twenty students from a large introductory psychology class volunteered to participate in the study; all were dedicated coffee drinkers and all drank caffeinated coffee. The volunteers were then randomly divided into two groups such that there were ten students in each group. One group of 10 students was asked to study the exam material while...
A researcher tests the effects of sleep deprivation on memory span (how many items (e.g., numbers)...
A researcher tests the effects of sleep deprivation on memory span (how many items (e.g., numbers) a person can keep in mind at once). Toward this end she recruits 5 participants. Each participant’s memory span is tested when normally rested (after waking from 8 hours of sleep), after being awake for 24 hours, and after being awake for 48 hours. The data are presented in the table below. Answer the following questions using an alpha of .05. Well-Rested 24 Hours...
______________________________ Sleep deprived Well Rested 3 5 2 3 7 3 1 2 2 1 6...
______________________________ Sleep deprived Well Rested 3 5 2 3 7 3 1 2 2 1 6 1 9 2 11 1 2 3 3 5 10 3 3 5 4 2 3 1 3 2 Researchers compared the reaction times in people who were sleep deprived versus people who had gotten a full night's rest. The following are typical data showing the reaction time scores (in seconds) for two groups (samples) of participants. (8 points) Compute the mean, the range,...
Researchers are interested in the effectiveness of a particular treatment for insomnia. They contact 50 insomnia...
Researchers are interested in the effectiveness of a particular treatment for insomnia. They contact 50 insomnia sufferers who responded to a newspaper advertisement to participate in the study. Each participant is given a pill with instructions to take it before going to sleep that night. The pill actually contains milk powder (a placebo). The participants are randomly assigned to receive one of two sets of instructions about the pill. One half of the participants are told that the pill will...
|A researcher was interested in whether there were |differences in the effect on performance on a...
|A researcher was interested in whether there were |differences in the effect on performance on a stats exam among students who attended 1) office hours regularly 2) both office hours and review sessions, 3) just review sessions, and 4) neither office hours nor review sessions The researcher randomly assigned students to one of the four groups. At the end of the first exam, the researcher gave students in all four groups a stats exam and obtained the following results: Office...
1. (15 pts total) Fourteen students participated in a research study on the effect of sleep...
1. (15 pts total) Fourteen students participated in a research study on the effect of sleep deprivation in a motor skill task. The students played the game "Operation" either after a full night of sleep or after being kept awake for 36 hours. Each task was measured two weeks apart. Half of the students were randomly assigned to sleep deprivation in the first week and a full night of sleep in the second week, and the other half completed the...
4. Sleep Deprivation: (10 pts) Sleep researchers decide to test the impact of REM sleep deprivation on a computerized assembly line task Subjects are required to participate in two nights of testing in which subjects are allorwed a total of four hours of sleep each night However, on one of the nights, the subject is awakened immediately upon achieving REM sleep (REM deprived. On the altenate night, subjects are randomly awakened at various times throughout the hou total sleep session...
2. Researchers were interested in evaluating the effects of two low-fat diets with and without resistance exercise training (RT) on weight loss. The diets differed in the carbohydrate-to-protein ratio. A total 80 individuals with type 2 diabetes participated in the study. There were 40 men and 40 women and each group was randomly assigned to an isocaloric diet of either standard or high protein, with or without supervised resistance training (3 days/week) for 16 weeks. Body weight was measured before...
|A researcher was interested in whether there were |differences in the effect on performance on a stats exam among students who attended 1) office hours regularly 2) both office hours and review sessions, 3) just review sessions, and 4) neither office hours nor review sessions The researcher randomly assigned students to one of the four groups. At the end of the first exam, the researcher gave students in all four groups a stats exam and obtained the following results: Office...
1. (15 pts total) Fourteen students participated in a research study on the effect of sleep deprivation in a motor skill task. The students played the game "Operation" either after a full night of sleep or after being kept awake for 36 hours. Each task was measured two weeks apart. Half of the students were randomly assigned to sleep deprivation in the first week and a full night of sleep in the second week, and the other half completed the...
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