How does an analog model improve internal validity? analog models ensure that participants don't know which group they're in, so that extraneous variables are less likely to have an impact. analog models create different research groups and make sure that every person in the study has an equal chance of placement within any group. analog models ensure that results apply to everyone with a particular disorder, improving internal validity. analog models re-create phenomena in the controlled conditions of the laboratory, holding constant the extraneous variables that could affect the outcomes of the study?

hello,

answer: a federal government has final authority on interstate/inter provincial  and international affairs, a confederation is one where the central/national government or authority is governing body what does not have final say over the same matters. hopefully this and i will try again if you don't like this answer : )

best of luck!

try something like republic or democracy joined or something because its talking about a election party.

hello

question:

when would a new household be started?

a.when the oldest male died

b.when a man and a woman married

c.when the house could not hold everyone

d.when a child was born

answer: us d when a child was born

hope this have a great day and brainlest

answer; dr.black,who allows only certain individuals to mate;