Results 141 to 150 of about 20,277 (256)

Optimum Estimators for Parameters of Lognormal Distribution [PDF]

The Egyptian Statistical Journal, 1977
S.A. Shaban
doaj   +1 more source

IRT‐based response style models and related methodology: Review and commentary

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract We provide a review and commentary on recent methodological research related to item response theory (IRT) modelling of response styles in psychological measurement. Our review describes the different categories of IRT models that have been proposed, their associated assumptions and extensions, and the varying purposes they can serve.
Daniel M. Bolt, Lionel Meng
wiley   +1 more source

Multidimensional unipolar IRT and applications to the measurement of print exposure

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Item response theory (IRT) has been a prominent modelling framework in educational and psychological measurement. Traditional IRT models are bipolar, commonly assuming symmetric measurement link functions and symmetric trait distributions over a latent continuum unbounded at both ends. However, many measured constructs, such as print exposure,
Qi (Helen) Huang, Daniel M. Bolt
wiley   +1 more source

Single‐grain K‐feldspar luminescence dating on primary and re‐deposited aeolian sediments in Mongolia

Boreas, EarlyView.
Owing to its location in the semi‐arid region of northern Central Asia, Mongolia is highly sensitive to climate change and therefore provides an excellent setting for palaeoenvironmental research. Proxy data from different sediment types are crucial for interpreting past climate changes and landscape evolution, while burial ages provide chronological ...
Junjie Zhang, Michael Klinge, Sumiko Tsukamoto, Daniela Sauer, Manfred Frechen   +4 more
wiley   +1 more source

Unravelling the phylogeny of armadillos and their kin (Mammalia, Xenarthra, Cingulata) combining morphological, molecular, and stratigraphic data

Cladistics, EarlyView.
Abstract Cingulata, a major lineage of Xenarthra, comprises extinct and extant armoured placental mammals that diversified throughout the Cenozoic. Despite extensive study, phylogenetic hypotheses based on morphological and molecular data remain incongruent, and no total evidence analysis has been conducted. Here, we integrate the largest morphological
Daniel M. Casali, Mariela C. Castro, Martin R. Ciancio, Timothy J. Gaudin, Jeremy L. Bramblett, Alberto Boscaini, Fernando A. Perini, Max C. Langer   +7 more
wiley   +1 more source

Testing the morphology‐ and intuition‐based taxonomic hypotheses using integrative approach: unexpected discovery of triplet of sibling species within a widespread Eurasian butterfly, Hyponephele lycaon

Cladistics, EarlyView.
Abstract In well‐studied groups of organisms, the taxonomic landscape can be very complex, with several alternative classifications describing diversity within the same set of populations. For example, three hypotheses have previously been proposed to describe the taxonomy of the common and widespread Eurasian Dusky Meadow Brown butterfly, Hyponephele ...
Elena A. Pazhenkova, Vladimir A. Lukhtanov   +1 more
wiley   +1 more source

Estimating the total mortality of seabirds following a marine heat wave

Conservation Biology, EarlyView.
Abstract Marine heat waves detrimentally affect a range of marine species, including seabirds, and are increasing in frequency and severity. When thousands of dead seabirds wash up on beaches, the public becomes concerned. However, the number of dead birds recorded on beaches is only a fraction of the total mortality; most birds perish at sea.
Jennifer L. Lavers, William Fulton, Silke Stuckenbrock, Alexander L. Bond   +3 more
wiley   +1 more source

Economic Burden of Chronic Lymphocytic Leukaemia in Australia

European Journal of Haematology, EarlyView.
ABSTRACT Background The treatment landscape for chronic lymphocytic leukaemia (CLL) has transformed over the past decade. This study aimed to estimate the healthcare costs and health burden associated with CLL in Australia. Methods A Markov model was developed to simulate the lifetime healthcare costs and health outcomes associated with CLL in ...
Lan Gao, Dieu Nguyen, Victoria White, Patricia M. Livingston, Chan Y. Cheah   +4 more
wiley   +1 more source

Life Cycle Consumption and Portfolio Choice Under Real Interest Rate Risk

Financial Management, EarlyView.
ABSTRACT We set up a life cycle model with real interest rate risk to demonstrate that real interest rates have implications for optimal household consumption and investments. Lower interest rates lead to higher optimal stock investments and lower consumption.
Marcel Fischer, Natascha Jankowski
wiley   +1 more source

Population‐Level Real‐World Healthcare Costs in Men and Women With Haemophilia A

Haemophilia, EarlyView.
ABSTRACT Introduction Even with modern prophylaxis options, people living with haemophilia have significantly lower quality of life and joint health outcomes than those without. Aim Our goal was to determine if real‐world health‐system costs are higher for people living with haemophilia A compared to those without and determine how joint‐health state ...
Sam Hirniak, Samantha S. M. Drover, Andrea N. Edginton, Dagmar M. Hajducek, Alfonso Iorio, Mhd. Wasem Alsabbagh, William W. L. Wong   +6 more
wiley   +1 more source