A year later, Alberto sets up an experiment where each participant is put in multiple conditions. For example, each participant tries to answer arithmetic problems while listening to metal, and then country, and finally classical music. Which design is he using now?

Within-Subjects Experiments

Explanation:

Within-Subjects Designs: this is a form of experimental design in which the participants involved is exposed or subjected to all the conditions.

However, in this case, Alberto, is using Within-Subject Designs (simultaneous) by exposing all the participants to answer arithmetic problems while listening to metal, and then country, and finally classical music simultenously.

The multiple conditions here are: arithmetic problems to solve, listening to different types of music in a sequence that mixed the different types.

there are no options provided but you can choose among the following gender-neutral pronouns: zir, hir, eir, vis, tem, eir.

in the normal course of maintaining a pronoun-antecedent agreement, we could have used the words his or her but since we are also required to use gender-neutral language, we need to replace it with its equivalent gender-neutral pronoun.

an informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.