| In defense of Piaget's theory: A reply to 10 common criticisms. O Lourenço, A Machado Psychological review 103 (1), 143, 1996 | 707 | 1996 |
| Learning the temporal dynamics of behavior. A Machado Psychological review 104 (2), 241, 1997 | 506 | 1997 |
| Toward a richer view of the scientific method: The role of conceptual analysis. A Machado, FJ Silva American Psychologist 62 (7), 671, 2007 | 234 | 2007 |
| Operant conditioning of behavioral variability using a percentile reinforcement schedule A Machado Journal of the Experimental Analysis of behavior 52 (2), 155-166, 1989 | 204 | 1989 |
| Facts, concepts, and theories: The shape of psychology's epistemic triangle A Machado, O Lourenço, FJ Silva Behavior and Philosophy, 1-40, 2000 | 166 | 2000 |
| Learning to time: A perspective A Machado, MT Malheiro, W Erlhagen Journal of the experimental analysis of behavior 92 (3), 423-458, 2009 | 143 | 2009 |
| Increasing the variability of response sequences in pigeons by adjusting the frequency of switching between two keys A Machado Journal of the Experimental Analysis of Behavior 68 (1), 1-25, 1997 | 131 | 1997 |
| Behavioral variability and frequency‐dependent selection A Machado Journal of the Experimental Analysis of behavior 58 (2), 241-263, 1992 | 127 | 1992 |
| The process of recurrent choice. DG Davis, JE Staddon, A Machado, RG Palmer Psychological Review 100 (2), 320, 1993 | 109 | 1993 |
| Shifts in the psychometric function and their implications for models of timing A Machado, P Guilhardi Journal of the Experimental Analysis of Behavior 74 (1), 25-54, 2000 | 80 | 2000 |
| Learning to time (LET) or scalar expectancy theory (SET)? A critical test of two models of timing A Machado, R Keen Psychological Science 10 (3), 285-290, 1999 | 80 | 1999 |
| Learning variable and stereotypical sequences of responses: Some data and a new model A Machado Behavioural Processes 30 (2), 103-129, 1993 | 77 | 1993 |
| Testing the boundaries of “paradoxical” predictions: Pigeons do disregard bad news. I Fortes, M Vasconcelos, A Machado Journal of Experimental Psychology: Animal Learning and Cognition 42 (4), 336, 2016 | 68 | 2016 |
| Acquisition and extinction under periodic reinforcement A Machado, M Cevik Behavioural processes 44 (2), 237-262, 1998 | 60 | 1998 |
| Temporal discrimination in a long operant chamber A Machado, R Keen Behavioural Processes 62 (1-3), 157-182, 2003 | 55 | 2003 |
| Testing the scalar expectancy theory (SET) and the learning-to-time model (LeT) in a double bisection task A Machado, P Pata Animal Learning & Behavior 33 (1), 111-122, 2005 | 53 | 2005 |
| Associative symmetry by pigeons after few‐exemplar training SM Velasco, EM Huziwara, A Machado, GY Tomanari Journal of the Experimental Analysis of Behavior 94 (3), 283-295, 2010 | 45 | 2010 |
| Further tests of the Scalar Expectancy Theory (SET) and the Learning-to-Time (LeT) model in a temporal bisection task A Machado, J Arantes Behavioural Processes 72 (3), 195-206, 2006 | 44 | 2006 |
| Shifts in the psychophysical function in rats P Guilhardi, MLM MacInnis, RM Church, A Machado Behavioural Processes 75 (2), 167-175, 2007 | 37 | 2007 |
| Ultimate explanations and suboptimal choice M Vasconcelos, A Machado, JNS Pandeirada Behavioural processes 152, 63-72, 2018 | 36 | 2018 |
