Number line estimation (i.e., indicating the position of a given number on a physical line) is a standard assessment of children's spatial representation of number magnitude. Importantly, there is an ongoing debate on the question in how far the bounded task version with start and endpoint given (e.g., 0 and 100) might induce specific estimation strategies and thus may not allow for unbiased in...

This study explores a new dataset in order to present the comparative determinants of growth quality in 93 developing countries for the period 1990-2011. We employ both cross-sectional and panel estimation techniques with contemporary and non-contemporary specifications. The determinants are quite heterogeneous in significance and magnitude with substantial inclinations to specifications and es...

Bias formulae are derived for ecological regression estimators. These formulae are useful for determining the direction and magnitude of bias in estimation. It is shown that when group cohesion is higher in areas with higher concentrations of group members and when polarization is higher in more homogeneous areas, ecological regression estimates of polarization will tend to be biased upward. Bo...

The three purposes of this study were to (a) describe fraction ordering errors among at-risk fourth grade students, (b) assess the effect of part-whole understanding and accuracy of fraction magnitude estimation on the probability of committing errors, and (c) examine the effect of students' ability to explain comparing problems on the probability of committing errors. Students ( N = 227) compl...

We present two magnitude estimation experiments on the role of resumptive pronouns in subject extraction in English and German. In the theoretical literature, resumptives have been claimed to remedy effects of island violations, but our results show that this is not the case. Furthermore, our data also confirm the existence of a that-trace effect for both languages, contrary to theoretical clai...

Fast global shift estimation is a critical preprocessing step on many high level tasks such as remote sensing or medical imaging. In this work we deal with a simple question: should we use an iterative technique to perform shift estimation or should we use a multiscale approach. Based on the obtained results, both methodologies proved to lose accuracy as the noise increases, however this accura...

We examined relations between symbolic and non-symbolic numerical magnitude representations, between whole number and fraction representations, and between these representations and overall mathematics achievement in fifth graders. Fraction and whole number symbolic and non-symbolic numerical magnitude understandings were measured using both magnitude comparison and number line estimation tasks...

In Exp. 1, the "protheticity" of the pleasantness of a diverse set of relatively isointensive odorants was estimated using exponents from power functions fitted by an interative least squares procedure between scale values established by (a) magnitude estimation and (b) category rating and rank ordering. In Exp. 2, this procedure was applied to intensity data derived from quarter-log-step volum...

Parallel excitation requires fast and accurate B1 map estimation. Bloch-Siegert (BS) B1 mapping is very fast and accurate over a large dynamic range. When applied to multi-coil systems, however, this phase-based method may produce low signal-to-noise ratio estimates in low magnitude regions due to localized excitation patterns of parallel excitation systems. Also, the imaging time increases wit...