Occurs when studies with statistically significant results are more likely to be published than studies with results close to the null.
-confounding
-validity
-generalization
-publication bias
-selection bias
-Confounding : "Mixing of effects".That is an additional factor is mixed up with the factor under study.
-Validity : If an instrument measures what we want to measure,then that instrument is valid.
Eg:Thermometer is valid for measuring temperature but not sphigmomanometer.
-Generalization : It is a form of abstraction.Common features of specific example is formulated as a general statement.
-Publication bias : Occurs when studies with statistically significant results are more likely to be published than studies with results close to the null.
-Selection bias : Error in the selection process mainly due to improper randomization.so,the sample taken will not be a representative of population.
Answer : Publication bias
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