Christian Stöcker

Hochschule für Angewandte Wissenschaften Hamburg | HAW · Department of Information

Die Hochschule für Angewandte Wissenschaften (HAW) Hamburg bietet mit dem M.A. Digitale Kommunikation einen in Deutschland einzigartigen Master-Studiengang an, der an den aktuellen Veränderungen des Berufsfeldes ansetzt und das an amerikanischen Journalistenschulen erfolgreiche Modell der „Teaching Hospitals“ mit dem Konzept universitärer Medienaus...

On 9th October 2019 an armed nationalist murdered two bypassing citizens in a killing spree directed at a synagogue in Halle, Germany. Instantly, a broad diffusion of information unfolded on Twitter. Traffic for tweets mentioning Halle reached a peak as high as a hundred times to average value of the days before. In this study we examine this immen...

YouTube has emerged as one of the most commonly used platforms for entertainment, information and political communication , for media consumers as well as professional communicators. News organizations and political parties alike have adopted strategies for publishing video content-ranging from already broadcasted news programs to political speeche...

Online platforms providing information and media content follow certain goals and optimize for certain metrics when deploying automated decision making systems to recommend pieces of content from the vast amount of media items uploaded to or indexed by their platforms every day. These optimization metrics differ markedly from, for example, the so-c...

Der Mann, den die meisten nur als Captain Kirk kennen, hat im Frühjahr 2017 ein prägnantes Beispiel dafür geliefert, wie sich unsere Medien- und Kommunikationswelt im vorangegangenen Jahrzehnt verändert hat.

When all age groups are considered, intermediaries driven by ADM processes, such as Google and Facebook, have a large but not a defining influence on how public opinion is formed, compared to editorially driven media such as television. These intermediaries judge the relevance of content based on the public's immediate reaction to a much greater de...

Algorithmische Prozesse strukturieren heute längst Öffentlichkeit, sei es in Form der Ergebnislisten von Suchmaschinen oder der Sortierung von Inhalten in den Newsfeeds sozialer Netzwerke. Diese neuen Gatekeeper, die Informationen zugänglich machen aber auch nach Relevanz gewichten, wenden andere Kriterien an, als das etwa Journalisten bei der Ausw...

Von algorithmischen Prozessen gesteuerte Intermediäre wie Google oder Facebook haben im Vergleich zu redaktionell gesteuerten Medien wie dem Fernsehen einen großen, aber bislang nicht entscheidenden Einfluss auf die öffentliche Meinungsbildung. Sie bewerten die Relevanz von Inhalten viel stärker als redaktionelle Medien an unmittelbaren Reaktionen...

The article presents an overview of notions of anticipatory control of behavior, meaning the control of behavior through advance representations of sensory effects. First, a brief historical overview of concepts regarding sensory effects as the intra‐psychic raw material of actions is presented. These concepts are generally subsumed under the term...

Previous research has shown that subliminally presented stimuli accelerate or delay responses afforded by supraliminally presented stimuli. Our experiments extend these findings by showing that unconscious stimuli even affect free choices between responses. Thus, actions that are phenomenally experienced as freely chosen are influenced without the...

Participants practiced short sequences of key presses; sequence length and response-effect mapping were the independent variables. Contingent, distinct key-effect relations were contrasted with either contingent but uniform or no response effects. In Experiment 1, tone effects were relevant as response-specific stimuli and also as effects. The sequ...

Die Arbeit befasst sich mit der Frage, welche Rolle die sensorischen Effekte von Handlungen beim Erwerb und der Steuerung von Bewegungen spielen. Dabei wird auf zwei experimentelle Ansätze zurückgegriffen, einerseits die serielle Wahlreaktionsaufgabe (SWR) und andererseits Trainingsstudien zum Erwerb kurzer motorischer Sequenzen. In der SWR ist es...

Participants performed a serial reaction time task, responding to either asterisks presented at varying screen locations or centrally presented letters. Stimulus presentation followed a fixed second-order conditional sequence. Each keypress in the experimental groups produced a contingent, key-specific tone effect. The critical variation concerned...

A non-spatial variant of the Simon effect for the stimulus-response (S-R) feature of duration is reported. In Experiment 1 subjects were required to press a single response key either briefly or longer in response to the colour of a visual stimulus that varied in its presentation duration. Short keypresses were initiated faster with short than with...

Tones were introduced into a serial reaction time (SRT) task to serve as redundant response effects. Experiment 1 showed that the tones improved serial learning with a 10-element stimulus sequence, but only if the tone effects were mapped onto the responses contingently. Experiment 2 demonstrated that switching to noncontingent response-effect mapp...