I think oxygen and carbon dioxide i'm not sure though
        
             
        
        
        
The theorist who believed that children learn language when they are reinforced by parental attention was B.F.Skinner. 
B.F.Skinner was a celebrated American psychologist who advanced the behaviorist theory of learning. This theory is based on the idea that learning occurs through a method of ‘conditioning’, which when stimulus, rewards, and punishments are combined to drive the learning process.
The conditioning relies on what Skinner calls reinforcement. Reinforcement is of two types, namely positive reinforcers, which are the rewards after meeting a target, and negative reinforcers, which refers to the unpleasant consequences of failing to meet the target.
Actions that are followed by negative reinforcers tend to weaken, while those followed by positive reinforcers tend to be repeated. For example, children can be encouraged to learn language if they receive consistent positive reinforcement from their parents every time they learn a new word or phrase.
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<span>Darley and Latane concluded that the bystander effect is due less to apathy and more to "diffusion of responsibility", which makes people feel unable to respond, often because they feel someone else would be more qualified to help and/or do a better job, and that their help may be unneeded or they may face consequences for botching the help. This is made worse when more people are around.</span>
        
             
        
        
        
7 participants are in each treatment.
number of participants in each treatment = n
number of factors = k
df within = k(n-1) = 24
df between = k-1 = 3
so,
k = 4
n = 7
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Answer:
Is initially neutral, and then comes to trigger a response.
Explanation:
In classical conditioning the conditioned stimulus is a previously neutral stimulus which gradually comes to cause a conditioned response after being associated with the unconditioned stimulus. Classical conditioning is a type of learning in which a conditioned stimulus is combined with an unrelated unconditioned stimulus to elicit a behavioral response known as a conditioned response. A response occurs with more regularity in a well-specified, stable environment. One of the key components of conditioning is a conditioned environment.