one of what?

25: Network Instrument

The participants were shown an item, taken from the possessions of someone, who was believed to have had some form of contact with each of the participants at least once. The particular item was chosen, because it seemed most likely not to evoke associations other than its acquired operational characteristics. It was therefore considered to be better suited as an aid for the participants to delineate their personal networks without having to take into account any circumstances or events that had, at any point, led to or had contributed to the establishment [or modification] of the network [or any of its constituents part(s)] itself.

23: Rules of the House

The social science that seeks to describe the factors which determine the production, distribution and consumption of goods and services.
οίκος (‘house’) νόμος (‘rule’)

22: Nostalgia

A fellow user named Hamsa, 43, who also hangs out in the Taunusanlage, paints a […] picture of the time when heroin was still the favoured drug in the Bahnhofsviertel: “Back then, everyone was friends. People talked to each other, did things together. Now that’s all over.  These days, drug addicts can stay awake for days at a time, just looking for ways to support their habits. Any sense of community is long gone.

(source: vice.com/en_uk/read/welcome-to-germanys-crack-capital-876)

17: Repetition

1. the action of repeating something that has already been said or written.
“the images were worthy of repetition”
synonyms:
reiteration, repeating, restatement, retelling, iteration, recapitulation; recital, rehearsal; informal recap; rare reprise, iterance
repeating, echoing, parroting, quoting, copying; echolalia

the recurrence of an action or event. 2.
“there was to be no repetition of those images”
recurrence, reoccurrence, repeat, rerun, replication, duplication; echo :synonyms