Spatial Thinking in Infancy: Origins and Development of Mental Rotation Between 3 and 10 Months of Age

Sex differences matter: Males and females are equal but not the same

Sex differences between males and females can be detected early in life. They are present also later even to a much greater extent affecting our life in adulthood and a wide spectrum of physical, psychological, cognitive, and behavioral characteristics. Moreover, sex differences matter also in individual's health and disease. In this article, we reviewed at first the sex differences in brain organization and function with respect to the underlying biological mechanisms. Since the individual functional differences in the brain, in turn, shape the behavior, sex-specific psychological/behavioral differences that can be observed in infants but also adults are consequently addressed. Finally, we briefly mention sex-dependent variations in susceptibility to selected disorders as well as their pathophysiology, diagnosis, and response to therapy. The understanding of biologically determined variability between males and females can have important implications, especially in gender-specific health care. We have the impression that it is very important to emphasize that sex matters. Males and females are differently programmed by nature, and it must be respected. Even though we as males and females are not the same, we would like to emphasize that we are still equal and together form a worthy colorful continuum.

Erfassung mentaler Rotationsleistungen im Grundschulalter

Zusammenfassung. Die mentalen Rotationsleistungen als eine Komponente visuell-räumlicher Fähigkeiten stehen in enger Verbindung zur mathematischen Entwicklung sowie zum schulischen und beruflichen Erfolg in den MINT-Fächern. Daneben werden geringe mentale Rotationsleistungen bei Kindern mit einer Lese-Rechtschreibstörung diskutiert. Derzeit ist kein Messinstrument für den Schuleingangsbereich verfügbar, welches sowohl die Lösungsgenauigkeit als auch die Reaktionszeit misst und den allgemeinen Kriterien der Psychometrie (Objektivität, Validität und Reliabilität) entspricht. Anliegen der vorgelegten Untersuchung ist es, diese Lücke zu schließen. In zwei Studien wurde ein computerbasiertes Testverfahren für Schulkinder bis zur dritten Klassenstufe entwickelt, welches die Besonderheiten bei der Erfassung mentaler Rotationsleistungen junger Kinder berücksichtigt. Die vorgenommenen testtheoretischen Betrachtungen an 300 Grundschulkindern waren zufriedenstellend. Die Daten konnten wesentliche Befunde der Literatur bestätigen und wurden kritisch diskutiert. Mit dem cMR liegt nun ein ökonomisches chronometrisches Testverfahren zur Erfassung mentaler Rotationsleistungen vor, welches bereits bei Kindern ab der ersten Klasse einsetzbar ist.

Reciprocal facilitation between mental and visuomotor rotations

Humans exhibit remarkably complex cognitive abilities and adaptive behavior in daily life. Cognitive operation in the "mental workspace," such as mentally rotating a piece of luggage to fit into fixed trunk space, helps us maintain and manipulate information on a moment-to-moment basis. Skill acquisition in the "sensorimotor workspace," such as learning a new mapping between the magnitude of new vehicle movement and wheel turn, allows us to adjust our behavior to changing environmental or internal demands to maintain appropriate motor performance. While this cognitive and sensorimotor synergy is at the root of adaptive behavior in the real world, their interplay has been understudied due to a divide-and-conquer approach. We evaluated whether a separate domain-specific or common domain-general operation drives mental and sensorimotor rotational transformations. We observed that participants improved the efficiency of mental rotation speed after the visuomotor rotation training, and their learning rate for visuomotor adaptation also improved after their mental rotation training. Such bidirectional transfer between two widely different tasks highlights the remarkable reciprocal plasticity and demonstrates a common transformation mechanism between two intertwined workspaces. Our findings urge the necessity of an explicitly integrated approach to enhance our understanding of the dynamic interdependence between cognitive and sensorimotor mechanisms.

Video Game Play Does Not Improve Spatial Skills When Controlling for Speed-Accuracy Trade-Off: Evidence From Mental-Rotation and Mental-Folding Tasks

Researchers have been divided on the efficacy of computerized cognitive training (CCT) for enhancing spatial abilities, transfer of training, and improving malleability of skills. In this study, we assessed the effects of puzzle video game training on subsequent mental rotation (MR) and mental folding (MF) performance among adults with no cognitive impairment. We assessed participants at baseline with the Shepard-Metzler MR test followed by the differential aptitude test: space relations MF test (i.e., far transfer). We ranked participants' skills on these pre-tests and used a matching technique to form two skill groups from which we then randomly assigned members of each skill group either to an experimental group or a wait-list control group. The experimental group played two puzzle video games closely related to two-dimensional and three-dimensional MR tasks during 4-week training sessions (total of 12 hour of video games). Post-training, participants completed the MR and MF tests again. Two months later, we re-assessed only the experimental group's spatial skills to explore the sustainability of the trained performance. In addition to response times (RT) and error scores (ES), reported separately, we combined these variables into rate correct scores (RCS) to form an integrated measure of potential speed-accuracy trade-offs (SAT). As a result, we did not find significant improvements in MR performance from CCT engagement, nor did participants show a transfer of skills obtained by practicing MR-related puzzle games to a MF task. Based on the current findings, we urge caution when proposing a game-based intervention as a training tool to enhance spatial abilities. We argue that separately interpreting individual test measures can be misleading, as they only partially represent performance. In contrast, composite scores illuminate underlying cognitive strategies and best determine whether an observed improvement is attributable to enhanced capacities or individual heuristics and learned cognitive shortcuts.