How does it feel to write a second PhD

Public and private Last week i had the viva for my Dr.rer.nat. To be specific, it was a sunny afternoon on a tuesday, the 28th of march 2017. We drew a small crowd. Not only did i defend in front of four professors. It was also a public event, and because my colleague and friend… Read more »

coding screens

Some Thoughts on Code Quality in Academia

I work in a neuroscience lab. Yet, during most day hours (and some night hours), I sit in front of a computer and write code. I guess you could group this code in three domains: Study Preparation This can be workspace definitions, protocols and scripts to run experiments, or low-level code to interface measurement devices…. Read more »

Neurofeedback Difficulty and Mental Effort

In sports training, a good way to set the intensity of a training session is according to your ability. If you train too hard, go softer. If you train too soft, go harder. This approach seems intuitive. Difficulty adaptation based on actual challenge seems sensible. But how can challenge be measured objectively? When is the… Read more »

Boundary element models of several brain areas

Put Shortly: If you want to perform source reconstruction for a region of interest, and therefore ignore some of the grid points of an evenly spaced source grid, these boundary-element models of several brain areas might be useful. In a previous post, i described how to construct a symetric headmodel based on the ICBM152 template… Read more »

Template Headmodel for Fieldtrip EEG Source Reconstruction based on ICBM152

Fieldtrip [1] includes a template headmodel based on the “Colin27” anatomical MRI. While this model is fine the way it is, there are some reasons why i do not like to use it. Colin27 is not symetric and also only based on a single individual. This can cause problems when you visualize your sources on… Read more »

Skin in the Game

There are a couple of tenured, influential professors who do not like data sharing and prefer rackets consentual collaboration. They write editorials in high-impact journals and call researchers who utilize open data „research parasites“. There are a couple of tenured, influential professors, who do like data sharing. They post blogs and rant on twitter and… Read more »

The first shadowrunner

As a teenager, i was hooked on cyberpunk. One of the core aspects of the cyberpunk genre is to live outside of government and corporate control as some kind of shadow-running outlaw, and using custom-made electronics and self-written software to jack into cyberspace, hack into secure systems and fight powerful AIs. Many, including me, consider… Read more »

Is the p-value a good measure for the weight of statistical evidence?

Many researchers naively follow the concept that a p-value below a certain threshold (traditionally .05)  is to be considered significant, and can therefore be considered as evidence that H1 is true, while a p-value above that level is considered not significant and therefore evidence that H0 is true. This Neyman-Pearson approach to statistical testing is… Read more »

Interpretation of statistical evidence and the naturalistic fallacy

Richard Royall starts his discussion about the interpretation of some data in regard to hypothesis A versus B as asking one of three questions: What does this observation tell me about A versus B? What do i believe, now that i have this observation? What should i do, now that i have this observation?1 He… Read more »

A couple of lectures i enjoyed

There is nothing that compares to watching middle-aged men talking nerdy to an invisible audience and scribbling math on a chalkboard! I collected a list of free lectures which i enjoyed. The collection has a focus on STEM, and includes math, probability, information theory and electronics.  I will probably add lectures to the collection when… Read more »

  • Reinforcement learning for adaptive threshold control of restorative brain-computer interfaces

    Restorative brain-computer interfaces (BCI) provide feedback of neuronal states to normalize pathological brain activity and achieve behavioral gains. Adaptive algorithms have proven to be powerful for assistive BCIs, but their inherent class switching clashes with the operant conditioning goal of restorative BCIs. Due to the treatment rationale of restorative BCIs, the classifier should be limited… Read more »

  • Restorative or assistive BCI? The Argument for a constrained feature space

    There is a major aspect which i believe is especially prevalent in the area of BCI for Stroke Rehab. It is the apparent gap between how Brain-computer-Interface (BCI) people, mostly recruited from mathematics and engineering departments and the Neurofeedback (NFB) people, mostly recruited from practitioners and psychologists understand the treatment. In my opinion this distinction… Read more »