“…Hence, Brunswik’s research mirrored the methodological demands of physicalism, which was highly debated in the Vienna Circle at that time and especially stressed by Otto Neurath (cf. Ash, 2001; Carnap, 1932; Radler 2013; Leary, 1987). To understand this approach, one must only reconsider Brunswik’s experiments—no thoughts, beliefs, or other mentalistic notions are striven for but only the “introspective minimum”: If a subject has the impression that the main object and the comparison object are of equal value, for example, height, then she has only to assert this (e.g., by answering “yes” or by raising a hand or using another gesture of affirmation).…”