Catela, DavidGens, LilianaMercê, Cristiana2020-12-182020-12-182018Catela, D., Gens, L., & Mercê, C. (2018). Fisher’(1967) Fisher’ (1967) ambiguity revised: a catastrophe theory’ approach (I) . Psychology Research, 8(11), 572-575. doi 10.17265/2159-5542/2018.11.0052159-55422159-5550http://hdl.handle.net/10400.15/3156Half of a century has passed on Fisher’ ambiguity pictures (1967). To celebrate this occasion, we have analysed his data, using a polynomial function for a cusp catastrophe, and we have discussed the results under dynamical systems theory’ propositions.engvisual perceptioncatastrophepotential landscapejournal article10.17265/2159-5542/2018.11.005