• Automatic processing of number identity and place-value in multi-digit numbers 

      García-Orza, Javier; Álvarez-Montesinos, Juan-Antonio; Estudillo, Alejandro; Calleja-Reina, Marina; Rodríguez, José Miguel (2016-09-27)
      The Arabic numerical system employs two dimensions to create multi-digit numbers: digits symbols and place-value. The present research explores in two numerical Stroop experiments to which extent number identity and number ...
    • Do we compute the exact number of digits in the string when comparing different-length numbers? 

      García-Orza, Javier; Gutiérrez-Cordero, Ismael; Álvarez-Montesinos, Juan Antonio (2022)
      Recent studies have shown that, when comparing multidigit numbers that differ in length (e.g., 2384-107), a decision is made considering length but also other attributes like the value of the initial digits (i.e., left-most ...
    • How many digits are there in a multi-digit number? 

      García-Orza, Javier; Álvarez-Montesinos, Juan-Antonio; Montenegro, Ismael R.; Cuadra, Marina (2017-09-15)
      The processing of multi-digit numbers have been usually studied comparing numbers with the same number of digits. In these cases, deciding which number is bigger simply requires comparing the leftmost digit of each number. ...
    • Individual differences in arithmetic fluency 

      García-Orza, Javier; Rodríguez, José Miguel; Calleja-Reina, Marina; Iza-Miqueleiz, Mauricio; Álvarez-Montesinos, Juan-Antonio (2016-05-10)
      Este estudio contrasta la hipótesis de que las dificultades que tienen algunos sujetos en el dominio de las tablas de multiplicar se deban a su incapacidad para afrontar la interferencia. Los resultados no muestran diferencias ...
    • Length is not all that matters: testing the role of number identity and the ratio of fillers in comparisons of multi-digits with different digit length 

      García-Orza, Javier; Gutiérrez-Cordero, Ismael; Larios, Carlos; Csilinkó, Anikó; Álvarez-Montesinos, Juan Antonio (Springer, 2022-02-18)
      Research in multi-digit number comparison usually considers stimuli with the same number of digits (e.g., 3452 vs. 7831). Surprisingly, there is almost no research on the comparison of numbers that differ in length (e.g., ...
    • Struggling with single-digit multiplications: testing several hypotheses 

      Álvarez-Montesinos, Juan-Antonio; Rodríguez-Montenegro, Ismael; Cuadra Jaime, Marina; García-Orza, Javier (2018-06-05)
      Between 5-10% of children suffer big difficulties in learning single-digit multiplications (Geary, 2011). In accordance with previous studies, difficulties in learning multiplications would be related with interference-control ...