1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mote1985 [20]
3 years ago
10

A shy and timid child works up the courage to raise his hand to answer a question. The teacher calls on him and the child delive

rs an excellent answer. The teacher exclaims, "That is the best answer I have heard all week! Great job! Come up to the front of the room to get a sticker!" Unfortunately, the child found all of this attention unpleasant and no longer answers questions in class. His behavior of answering questions was:
A. negatively punished.
B. positively punished.
C. positively reinforced.
D. negatively reinforced.
Social Studies
1 answer:
WINSTONCH [101]3 years ago
6 0

Answer:

C. positively reinforced.

Explanation:

because it encourages the student to do better in the future and to be more confident and feel more safe in the school learning environment

You might be interested in
What is the name of the Mexican peninsula that juts into the pacific ocean
Nastasia [14]
Baja California Peninsula
3 0
3 years ago
Read the following text:
makkiz [27]
I believe the correct answer is <span>C. constrain the power of the legislative branch.
Hamilton explicitly says in the excerpt that the job of the courts was to 'keep [the legislature] within the limits assigned to their authority.' This means that they cannot do anything they are not authorized to do, which the court makes sure happens.
</span>
4 0
2 years ago
What makes us human?
pochemuha
The answer would be: <span>d. biology, culture, and behavior
Biology refers to everything that derives from our genetics, which give differenc characteristics between each person.
Culture refers to the set of belief that is held dearly by people within a certain social group, and behaviors refers to how we deal with our emotions.</span>
3 0
3 years ago
In contrast with _____ research, _____ research allows cause-and-effect conclusions.
Whitepunk [10]
<span>In contrast with correlational research, experimental research allows cause-and-effect conclusions. This is because experimental research limits the number of independent variables to one variable, so we know that the independent variable has an effect on the dependent variable. In correlational research the independent variable is not limited to one, so while we know there is a correlation between the independent and dependent variable, we don't know that it caused it. An example is that on a rainy day we see a people carrying umbrellas. However, the correlation between people carrying umbrellas and the rain does not mean the people carrying the umbrellas caused the rain.</span>
7 0
3 years ago
How to put survival in study when subjects are added in 10 months period?
Evgen [1.6K]
Learning Objectives

After completing this module, the student will be able to:

<span>Identify applications with time to event outcomesConstruct a life table using the actuarial approachConstruct a life table using the Kaplan-Meier approachPerform and interpret the log rank testCompute and interpret a hazard ratioInterpret coefficients in Cox proportional hazards regression analysis</span>

Time to Event Variables

There are unique features of time to event variables. First, times to event are always positive and their distributions are often skewed. For example, in a study assessing time to relapse in high risk patients, the majority of events (relapses) may occur early in the follow up with very few occurring later. On the other hand, in a study of time to death in a community based sample, the majority of events (deaths) may occur later in the follow up. Standard statistical procedures that assume normality of distributions do not apply. Nonparametric procedures could be invoked except for the fact that there are additional issues. Specifically, complete data (actual time to event data) is not always available on each participant in a study. In many studies, participants are enrolled over a period of time (months or years) and the study ends on a specific calendar date. Thus, participants who enroll later are followed for a shorter period than participants who enroll early. Some participants may drop out of the study before the end of the follow-up period (e.g., move away, become disinterested) and others may die during the follow-up period (assuming the outcome of interest is not death).

In each of these instances, we have incomplete follow-up information. True survival time (sometimes called failure time) is not known because the study ends or because a participant drops out of the study before experiencing the event. What we know is that the participants survival time is greater than their last observed follow-up time. These times are called censored times.

Censoring

There are several different types of censoring. The most common is called right censoring and occurs when a participant does not have the event of interest during the study and thus their last observed follow-up time is less than their time to event. This can occur when a participant drops out before the study ends or when a participant is event free at the end of the observation period.

In the first instance, the participants observed time is less than the length of the follow-up and in the second, the participant's observed time is equal to the length of the follow-up period. These issues are illustrated in the following examples.

 

Example:

A small prospective study is run and follows ten participants for the development of myocardial infarction (MI, or heart attack) over a period of 10 years. Participants are recruited into the study over a period of two years and are followed for up to 10 years. The graphic below indicates when they enrolled and what subsequently happened to them during the observation period.

During the study period, three participants suffer myocardial infarction (MI), one dies, two drop out of the study (for unknown reasons), and four complete the 10-year follow-up without suffering MI. The figure below shows the same data, but shows survival time starting at a common time zero (i.e., as if all participants enrolled in the study at the same time).


8 0
3 years ago
Other questions:
  • When installing the canvas cargo cover on the HMMWV, what feature holds the canvas top securely against the sides of the vehicle
    9·1 answer
  • A man goes to bed at his regular time, and as he begins to drift slowly off to sleep, he jumps up suddenly as he feels he is fal
    9·1 answer
  • True or false not all frustration leads to aggression
    9·1 answer
  • "two-year-old maya is building a block tower. her father begins by pointing to where each block needs to go as maya piles them u
    5·1 answer
  • Why did fewer people settle in outer china than in inner china?
    9·1 answer
  • After two elements react to completion in a closed container, the ratio of their masses in the container will be the same as bef
    11·1 answer
  • Is Christopher Columbus a hero or a villain for his role in the age of exploration​
    15·1 answer
  • PLEASE HELP THIS IS VERY IMPORTANT I WILL GIVE U BRAINLIEST IF ITS CORRECT NO LINKS PLEASE (rip my points i only have 6 now D: )
    8·2 answers
  • How many children were killed during the holocaust??
    8·1 answer
  • What is so delicate that even saying its name breaks it
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!