Respuesta :
In a coctail party effect, participants were unable to do three of the choices but they notice specific changes when the unattended speech was played backward. An example of a cocktail party effect is when a partygoer can only focus one conversation in a room which is very loud. The other choices involves with the tone of voice but except letter d which involves the arrangement or sequence in reading.
Answer: C. detect when an unattended language was changed to German.
The cocktail party effect refers to ability of a person to focus on a single speaker or conservation in a noise prone area. This mainly reflects listening ability of the person in a noisy environment. If a listener hears unattended language for a particular time along with noise.The listener may loose interest in listening and he will not show alertness when language changes to German which could be known language to listener.